What is a good vegetarian dish to bring to a potluck that everyone is likely to enjoy?

A mixed squash casserole would be nice.

2c. zucchini

2c. yellow summer squash

1c. sliced yellow onions

4T. margarine

2T corn starch

bread crumbs

Combine all ingredients in covered baking dish, bake @ 350 until squash is tender. Remove lid, sprinkle bread crumbs on top, bake until crumbs are golden.