1-Step 1: Prepare Your Equipment and Eggplant Start by positioning oven racks in the upper and lower thirds of your oven. Preheat to 400°F. Lightly coat 2 rimmed baking sheets and a 9×13-inch baking dish with nonstick spray. Proper preparation ensures even cooking and easy cleanup. Arrange the eggplant slices in a single layer on your baking sheets. If any slices have curved ends, trim them slightly for a flatter surface. Brush both sides of each slice with 2 1/2 tablespoons of olive oil total, then sprinkle with 1/2 teaspoon kosher salt and 1/4 teaspoon pepper. According to Healthline’s guide to eggplant benefits, this versatile vegetable is rich in antioxidants and fiber, making it an excellent pasta substitute.

2-Step 2: Roast the Eggplant Roast the eggplant for about 25 minutes, flipping slices and swapping pans halfway through. This ensures even browning on all pieces. The eggplant should be tender and slightly golden when done. Remove from the oven and reduce heat to 350°F for the final baking step. Roasting at high heat tenderizes the eggplant and prevents the slimy texture that often plagues eggplant dishes. The slices will become pliable and noodle-like, perfect for layering in your low carb lasagna.

3-Step 3: Prepare the Mushroom Marinara Sauce While the eggplant roasts, heat the remaining 1 tablespoon olive oil in a large skillet over medium heat. Add the sliced cremini mushrooms and sauté until soft, about 7 minutes. As noted by the Harvard T.H. Chan School of Public Health, mushrooms provide essential nutrients including B vitamins and selenium while adding savory depth to dishes. Add the minced garlic, 1/2 teaspoon kosher salt, and dried oregano to the mushrooms. Cook for 2 more minutes until fragrant. Remove from heat and stir in the prepared marinara sauce. This mushroom-enhanced sauce adds body and umami that elevates the entire dish.

4-Step 4: Mix the Ricotta Filling In a large bowl, combine the ricotta cheese, 1/4 cup Parmesan, egg, remaining 1/2 teaspoon salt, and remaining 1/4 teaspoon pepper. Mix thoroughly until smooth and well combined. The egg acts as a binder, helping the ricotta layer hold its shape when sliced. Stir in the thawed spinach, breaking it up evenly throughout the mixture. This adds extra vegetables and nutrients without overwhelming the flavor. The spinach blends seamlessly into the creamy ricotta, making it a great way to sneak more greens into your meal.

5-Step 5: Assemble the Lasagna Layers Now comes the fun part: building your Italian eggplant lasagna. Spread half the mushroom marinara sauce evenly across the bottom of your prepared 9×13-inch baking dish. This creates a flavorful foundation and prevents sticking. Layer 4 eggplant slices over the sauce, arranging them to cover as much surface area as possible. Spread all the ricotta mixture over the eggplant in an even layer. Add the remaining 4 eggplant slices on top of the ricotta. Top with the remaining mushroom marinara sauce, spreading it to cover the eggplant completely. Finally, sprinkle with the shredded mozzarella and the remaining 1/4 cup Parmesan cheese.

6-Step 6: Bake and Serve Bake your assembled lasagna at 350°F for 25 to 30 minutes. The cheese should be melted and bubbly, and the entire dish hot throughout. Remove from the oven and sprinkle with your choice of fresh herbs like basil, thyme, or parsley. Let the lasagna rest for 5 to 10 minutes before serving. This resting period allows the layers to set, making it easier to cut clean slices. Your easy low carb eggplant lasagna recipe is now ready to serve!