1 lg. head cauliflower
1/4 c. butter, divided
1/2 c. diced onion
1 1/2 c. (6 oz.) shredded cheddar cheese
1 c. (8 oz.) sour cream
1/4 tsp. salt
1/2 c. dried bread crumbs

Break cauliflower into sections. Cook for 10 minutes in salted water. Drain well. Combine cauliflower with 2 tablespoons butter, onion, cheese, sour cream and salt. Spoon into 1 1/2 quart casserole. Melt remaining butter and toss with bread crumbs. Sprinkle over cauliflower mixture. Bake at 350 degrees for 30-40 minutes.