zucchini in a little boiling water until tender. Drain. Saute carrots and onions in 4 Tbsp butter until tender. Remove from heat, stir in 1-1/2 cup stuffing cubes, soup, and sour cream. Gently stir in zucchini. Turn into a casserole dish. Melt remaining butter and combine with remaining stuffing cubes. Toss lightly and spoon onto top of casserole. Bake uncovered 30-40 minutes at 350 degrees. Serves 6-8.