Zucchini Vegetable Bake

4-6 large carrots, peeled, sliced in rounds
1/2 C onion, finely chopped
4-6 small zucchini, sliced in rounds (about 3 cups)
1 C sliced fresh mushrooms
1/2 C chicken broth
1/4 cube butter
salt and pepper
1/2 C grated swiss or jack cheese

Par boil carrots and onion until carrots are almost tender, don't overcook. Place carrots, onion and squash in casserole dish. Add chicken broth, seasonings and top with butter. Cover and bake 20 minutes at 350 degrees or microwave for 5-7 minutes. Top with cheese and bake 2 minutes more (uncovered) until cheese melts.