Prep Time: 10 Min
Cook Time: 50 Min
Preheat oven to 375 F.
Cook onion and garlic in 2 tbsp olive oil for 2-3 minutes, stirring frequently.
Add tomatoes, salt, sugar and seasonings and simmer for 12-15 minutes, until thickened.
Cut vegetables into 1/8 inch thickness.
Pour sauce into a 2-3 quart baking dish (either round or square).
Arrange sliced vegetables alternating tomatoes, zucchini, eggplant and onion standing up on their sides. Cover and bake for 30 minutes.
Uncover and bake for additional 15-20 minutes, until tender.
Add salt and pepper on top. Drizzle with olive oil. Add grated Parmesan cheese and parsley (optional).
Store in an airtight container in the fridge for up to 5 days.