Heat 1 tablespoon olive oil in a large pot or Dutch oven over medium heat. Add the onion and garlic and saute 5 minutes or until the onion has softened.

Add one more tablespoon of olive oil and add the eggplant. Saute for 1 minute and reduce heat to medium low and cover for about 10 minutes or until the eggplant is soft, stirring occasionally. Add 1-2 more tablespoons of oil if the pan becomes dry.

Add the zucchini and bell pepper and saute 2 minutes. Turn the heat back up to medium and add the crushed tomatoes, tomato paste, sugar, and thyme. Stir and bring to a boil. Reduce heat and simmer for 20-30 minutes.

Stir in the freshly chopped basil.

Preheat the oven to 350 degrees and grease a 9x13" baking dish with cooking spray.

Boil the lasagna according to package instructions and drain.

Place 1 cup of sauce in the bottom of the baking dish. Layer with the pasta, then spread 1/4 of the ricotta over the noodles. Top with more sauce, followed by the grated cheese. Repeat layers and bake in the oven for 30-45 minutes, till bubbly and golden brown. If the lasagna is browning too quickly, cover loosely with foil.

Let the lasagna stand at room temperature for 10-15 minutes, then slice and serve. Serve garnished with more fresh basil if desired, and enjoy!