Buttery Cauliflower Casserole

1 head cauliflower, broken into flowerets
1 c. sour cream
1 c. shredded Cheddar cheese
1/2 c. round buttery crackers, crushed
1/4 c. green peppers, chopped
1/2 c. red peppers, chopped
1 t. salt
1/4 c. grated Parmesan cheese

Place cauliflower in a saucepan filled with one inch water; cook until tender. Drain. Stir in sour cream, cheese, crushed crackers, peppers and salt; spoon into a greased 2-quart casserole dish. Sprinkle with Parmesan cheese; bake at 325 degrees for 30 minutes. Serves 6 to 8.