1 (20 oz.) frozen mixed vegetables
1 (8 oz.) Velveeta
1/2 c. butter
1 med. onion, chopped
1 sm. can mushrooms (optional)
30 Ritz crackers, crumbled

Cook mixed vegetables according to package directions. Drain. Melt Velveeta with 1/4 cup butter. Mix with vegetables. Add onion and mushrooms if desired. Then put the Ritz crackers on top. Use 1/4 cup of butter on top. Bake at 350 degrees for 20-30 minutes until bubbly hot.