You've got one fifth of the vegetables for one of the best dishes in the world... and relatively easy to make, that being ratatouille...
Here's a recipe that we use often...
Ingredients:
2 tablespoons olive oil
2 cloves garlic, crushed and minced
1 large onion, quartered and thinly sliced
1 small eggplant, cubed
2 green bell peppers, coarsely chopped
4 large tomatoes, coarsely chopped, or 2 cans (14.5 ounces each) diced tomatoes
3 to 4 small zucchini, cut into 1/4-inch slices
1 teaspoon dried leaf basil
1/2 teaspoon dried leaf oregano
1/4 teaspoon dried leaf thyme
2 tablespoons chopped fresh parsley
Preparation:
In a 4-quart Dutch oven or saucepan, heat olive oil over medium heat. Add garlic and onions and cook, stirring often, until softened, about 6 to 7 minutes. Add eggplant; stir until coated with oil. Add peppers; stir to combine. Cover and cook for 10 minutes, stirring occasionally to keep vegetables from sticking.
Add tomatoes, zucchini, and herbs; mix well. Cover and cook over low heat about 15 minutes, or until eggplant is tender but not too soft.
If you have a surplus of the zuchinnis, just slice and freeze them in a heavy duty freezer bag... they'll keep until winter and make a good stew or soup...