Preheat oven to 425 degrees F and line a baking sheet with a silicone baking mat. Set aside.
Place prepped vegetables onto the prepared baking sheet and toss with oil, salt, and pepper.
Roast in the preheated oven for 20-45 minutes, or until the veggies are cooked to your liking, stirring halfway through.
Drain the veggies and keep them in a colander while you’re assembling the lasagna (this removes excess moisture).
Filling
Place cottage cheese, 8 oz mozzarella, 1/2 cup parmesan, Italian seasoning, basil, garlic powder, onion powder, nutmeg, salt, pepper, and eggs into a food processor.
Process until combined. It's okay if it's still a little chunky. Set aside.
Assembling and Baking
Preheat oven to 350 degrees F and grease a deep 9x13 inch baking dish with cooking spray.
Spread 1 cup marinara sauce into the bottom of the dish.
To assemble: repeat the below steps (steps 4-8) 4 times.
Arrange 4 noodles lengthwise over sauce.
Spread with 1/4th of the cottage cheese mixture.
Top with 1/4th of the veggies.
Drizzle on (approx.) 1/2 jar pasta sauce.
Sprinkle with 2 tablespoons parmesan cheese.
Once the layers are complete, top with remaining 8 oz mozzarella cheese.
Bake in preheated oven, uncovered, for 40 minutes.