- Heat the oven to 425° F (220° C). 
- Toss the zucchini, peppers and onions in oil with the Italian seasonings, red pepper flakes, and salt and pepper in a medium bowl until thoroughly coated. 
- Spread the seasoned vegetables on a baking sheet and roast until tender crisp, about 25 minutes. 
- While the vegetables are roasting, cook lasagna noodles in boiling water to al dente, about 6-8 minutes. Drain and set aside. 
- Remove the vegetables from the oven and transfer them to a bowl. Stir in ½ cup of marinara. 
- In a separate small bowl, combine the ricotta and 2 tablespoons of the Parmesan cheese together. 
- Spread 2-3 tablespoons of the tomato sauce on the bottom of a lightly greased small baking dish (5x5 or 4x6”). Line the bottom of the dish with the noodles so that the noodles hang over the sides. 
- Top the noodles with the vegetables and sauce mixture. 
- Spread the cheese mixture over the vegetables and top with half of the mozzarella cheese. Fold the noodles over the top. 
- Top with the remaining marinara, mozzarella, and place the lasagna on a baking sheet. Bake until the cheese has melted, about 25 minutes. 
- Remove from the oven and let the lasagna rest for 10 minutes. Garnish with chopped basil before serving.