1 1/2 c. shredded processed cheese food, such as Velveeta
1/2 c. mayonnaise
1 (10 3/4 oz.) can condensed cream of onion soup
4 tbsp. butter
2 med. tomatoes, diced
1/2 c. seasoned dry bread crumbs
1 c. milk
3 c. diced broccoli
1/2 lb. elbow macaroni, cooked and drained
1/4 c. grated Parmesan cheese

Combine cheese, mayonnaise, milk, and soup; mix well. Melt 2 tablespoons butter in small skillet and saturate broccoli for 3 minutes. Remove from heat. Add tomatoes, then mix with cheese mixture. Add macaroni. Turn into a 2 1/2 quart baking dish. Melt remaining 2 tablespoons butter and stir in bread crumbs and Parmesan cheese. Sprinkle over casserole. Bake at 350 degrees for 35 to 45 minutes or until heated through. This makes about 6 servings.