Name: Eggplant Lasagna
Prep time: 30 min
Cook time: 70 min
Total time: 115 min
Ingredients: 2 1/2 pounds eggplant (about 1.1 kg, sliced lengthwise into 1/4-inch-thick planks); 3 tablespoons olive oil (45 mL); 1/2 teaspoon kosher salt (2.5 g); 1/4 teaspoon freshly ground black pepper (0.5 g); 2 tablespoons olive oil (30 mL); 4 garlic cloves (about 12 g, minced); 24 ounces marinara sauce (about 680 g); 1 teaspoon Italian seasoning (about 1 g); 1/4 teaspoon crushed red pepper flakes (about 0.5 g, optional); 15 ounces whole-milk ricotta cheese (about 425 g); 1 large egg (about 50 g, lightly beaten); 1/2 cup grated Parmesan cheese (about 45 g); 2 tablespoons chopped fresh parsley (about 8 g); 1/4 teaspoon kosher salt (1.25 g); 1/4 teaspoon freshly ground black pepper (0.5 g); 2 cups shredded low-moisture mozzarella cheese (about 225 g); 1/4 cup grated Parmesan cheese (about 23 g)

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Eggplant Lasagna is a hearty baked casserole layered with tender roasted eggplant, rich tomato sauce, creamy ricotta, and melted mozzarella. Roasting the eggplant first concentrates its flavor and helps prevent the finished lasagna from becoming watery.

This version skips traditional pasta sheets in favor of eggplant while keeping the familiar layered structure of classic lasagna. It can be assembled ahead and baked when you're ready to serve, making it a practical option for a family dinner or weekend meal.

Why This Recipe Works

Roasting removes excess moisture: Eggplant contains a lot of water, and roasting it before layering helps produce a firmer lasagna.
Ricotta creates a creamy middle layer: The ricotta mixture adds richness without requiring a heavy cream sauce.
Marinara provides acidity: Bright tomato flavor balances the richness of the cheese and roasted eggplant.
A covered first bake protects the cheese: Covering the casserole helps heat the center without drying the top before the layers are fully warmed.
Resting improves the slices: A short cooling period allows the cheese and sauce to settle so the lasagna holds together better.

Equipment Needed

Large rimmed baking sheet
Parchment paper
9×13-inch baking dish
Large skillet or saucepan
Medium mixing bowl
Sharp chef's knife
Cutting board
Wooden spoon or spatula
Aluminum foil

Ingredients List

Roasted Eggplant

2 1/2 pounds eggplant, about 1.1 kg, sliced lengthwise into 1/4-inch-thick planks
3 tablespoons olive oil, 45 mL
1/2 teaspoon kosher salt, 2.5 g
1/4 teaspoon freshly ground black pepper, 0.5 g

Tomato Sauce

2 tablespoons olive oil, 30 mL
4 garlic cloves, about 12 g, minced
24 ounces marinara sauce, about 680 g
1 teaspoon Italian seasoning, about 1 g
1/4 teaspoon crushed red pepper flakes, about 0.5 g, optional

Ricotta Filling

15 ounces whole-milk ricotta cheese, about 425 g
1 large egg, about 50 g, lightly beaten
1/2 cup grated Parmesan cheese, about 45 g
2 tablespoons chopped fresh parsley, about 8 g
1/4 teaspoon kosher salt, 1.25 g
1/4 teaspoon freshly ground black pepper, 0.5 g

Cheese Topping

2 cups shredded low-moisture mozzarella cheese, about 225 g
1/4 cup grated Parmesan cheese, about 23 g

Ingredient Notes and Substitutions

Eggplant: Choose firm medium-sized eggplants with smooth skin. They provide substantial slices that hold the layers together. Zucchini can be substituted, but it contains considerable moisture and may produce a softer casserole.
Whole-milk ricotta: Whole-milk ricotta creates a creamy, rich filling. Part-skim ricotta can be used, but the texture will be slightly less luxurious.
Low-moisture mozzarella: This melts well without releasing as much water as fresh mozzarella. Fresh mozzarella can be used, but drain and pat it very dry first.
Marinara sauce: A thick marinara helps prevent watery lasagna. If your sauce is particularly thin, simmer it for several extra minutes before assembling.
Parmesan: Parmesan adds salty, nutty flavor and helps the cheese layers brown. Pecorino Romano can substitute, but it is saltier and sharper.

Step-by-Step Instructions

Step 1: Heat the oven and prepare the pan.

Preheat the oven to 425°F (220°C). Line a large rimmed baking sheet with parchment paper.

Step 2: Prepare the eggplant.

Slice the 2 1/2 pounds eggplant lengthwise into planks about 1/4 inch thick. Arrange them in a single layer on the prepared baking sheet. Brush both sides with the 3 tablespoons olive oil, then season with the 1/2 teaspoon kosher salt and 1/4 teaspoon black pepper.

Step 3: Roast the eggplant.

Roast for 20–25 minutes, turning the slices halfway through. They should be tender and lightly browned at the edges. If the slices still look firm in the center, roast for another 3–5 minutes. Let them cool slightly while you prepare the other layers.

Step 4: Prepare the tomato sauce.

Reduce the oven temperature to 375°F (190°C). Heat the 2 tablespoons olive oil in a large skillet or saucepan over medium heat. Add the 4 minced garlic cloves and cook for about 30 seconds, until fragrant.

Step 5: Simmer the sauce.

Stir in the 24 ounces marinara sauce, 1 teaspoon Italian seasoning, and optional 1/4 teaspoon crushed red pepper flakes. Simmer over medium-low heat for 8–10 minutes, stirring occasionally. The sauce should be thick enough to coat a spoon. If it looks watery, continue simmering for a few more minutes.

Step 6: Mix the ricotta filling.

In a medium bowl, combine the 15 ounces ricotta, 1 beaten egg, 1/2 cup Parmesan, 2 tablespoons parsley, 1/4 teaspoon kosher salt, and 1/4 teaspoon black pepper. Stir until evenly combined and creamy.

Step 7: Start the first layer.

Spread about 1/2 cup of the tomato sauce over the bottom of a 9×13-inch baking dish. Arrange a layer of roasted eggplant over the sauce, slightly overlapping the pieces if necessary.

Step 8: Build the remaining layers.

Spread about one-third of the ricotta mixture over the eggplant. Sprinkle with some of the 2 cups shredded mozzarella. Add another layer of eggplant, followed by sauce, ricotta, and mozzarella. Repeat until the ingredients are used, finishing with a layer of tomato sauce.

Step 9: Add the final cheese layer.

Sprinkle the remaining mozzarella over the top, followed by the 1/4 cup Parmesan. The surface should be evenly covered but not packed down.

Step 10: Bake covered.

Cover the baking dish loosely with aluminum foil, making sure the foil does not press directly into the cheese. Bake at 375°F (190°C) for 30 minutes.

Step 11: Brown the top.

Remove the foil and continue baking for 15–20 minutes, until the sauce is bubbling around the edges and the cheese is melted and golden brown. For deeper browning, you can broil for 1–2 minutes, watching constantly.

Step 12: Rest before serving.

Remove the lasagna from the oven and let it rest for 15 minutes before slicing. This gives the layers time to firm up. Cut into 8 portions and serve warm.

Tips for Success

Don't skip roasting the eggplant: This is the most important step for avoiding a watery lasagna.
Use a thick tomato sauce: A thin sauce adds excess moisture to an already vegetable-heavy casserole.
Don't oversalt the eggplant: Parmesan, mozzarella, marinara, and ricotta all contribute some salt.
Let the lasagna rest: Cutting immediately after baking can cause the layers to slide apart.
Watch the broiler carefully: Cheese can go from golden to burnt in less than a minute under high heat.
Keep the eggplant slices intact: Roast them until tender but not so soft that they fall apart when lifted.

Storage, Freezing, and Make-Ahead Instructions

Store leftover lasagna in an airtight container or cover the baking dish tightly and refrigerate for up to 4 days . Reheat individual portions in the microwave or reheat larger portions covered with foil in a 350°F (175°C) oven until hot throughout.
For make-ahead preparation, assemble the lasagna up to 1 day in advance . Cover tightly and refrigerate. Bake directly from the refrigerator at 375°F (190°C) , adding about 10–15 minutes to the covered baking time before removing the foil.
To freeze, assemble the lasagna in a freezer-safe baking dish and freeze it before baking . Wrap it tightly and freeze for up to 3 months . Thaw overnight in the refrigerator, then bake as directed, adding extra time if the center is still cold.

FAQ

Can I make eggplant lasagna without salting the eggplant first?

Yes. Roasting the eggplant directly is sufficient for this recipe because the slices are cooked at high heat before assembly. Choosing firm eggplant and avoiding overcrowding the baking sheet are more important for controlling moisture here.

Why is my eggplant lasagna watery?

Excess moisture usually comes from under-roasted eggplant or thin tomato sauce. Roast the eggplant until tender and lightly browned, and simmer watery marinara until it thickens before assembling.

Can I use zucchini instead of eggplant?

Yes, but the texture will be softer because zucchini contains more water. Slice it thinly, roast it thoroughly, and avoid overlapping too many pieces on the baking sheet.

Can I use fresh mozzarella?

Yes. Drain the mozzarella thoroughly and pat it dry before shredding or slicing it. Fresh mozzarella releases more moisture than low-moisture mozzarella, so the finished lasagna may be softer.

Can I assemble eggplant lasagna ahead of time?

Yes. Assemble it up to 1 day ahead, cover tightly, and refrigerate. Bake when ready, allowing additional time because the casserole will be cold.