1 pkg. Mexican Velveeta cheese
1/2 c. onions, chopped
2 tbsp. butter
1 can tomatoes
Nacho chips
1 lb. hamburger (optional)

Melt Velveeta cheese in microwave. Stir frequently. In skillet saute 1/2 cup onions and butter. Mix onion and butter with cheese sauce and add tomatoes. Optional: Add meat. Heat and eat with nachos.