Zucchini is the star in this casserole with summer squash, potatoes, onions, and tomatoes in supporting roles. If you are not a fan of tomatoes, it is ok to omit them from the recipe. Also, if you do not particularly like summer squash, just replace it with more zucchini.
This recipe feeds 4-6 as a side dish and 2-4 as a main dish. I like to have it alongside a fresh green salad and some crunchy bread. It also makes a great filling for tortilla shells!
It also stores well in refrigerator, after baking, for about 3 days.