1/4 cup butter
1 pound bacon
1 onion, chopped
1 tablespoon salt
1 (10 ounce) can sliced or diced tomatoes with liquid
1 cup milk
2 teaspoons dried minced onion
2 (10 ounce) cans sliced mushrooms
1 pound processed cheese food, cubed
1/4 cup Worcestershire sauce
1/4 cup prepared horseradish, divided
Preheat oven to 350 degrees F (175 degrees C).
Melt butter in a medium saucepan and bring to a boil. Stir in bacon and cook well. Drain grease and place in a large bowl. Mix tomatoes with liquid into pan. Spoon bacon grease over tomato mixture.
Stir in milk, tomatoes, mushrooms, cheese, Worcestershire sauce and horseradish. Pour over all.
Bake in preheated oven for 60 minutes. Reduce heat to 350 degrees F (175 degrees C). Bake an additional 15 minutes.