Ingredients

• 1 tablespoon butter
• 4 large sweet onions, sliced
• 1/2 pound Swiss cheese, shredded
• 10 slices Italian bread
• 1/4 cup butter, softened
• 1/2 cup milk
• 1 (10.75 ounce) can condensed cream of mushroom soup
• 3 teaspoons soy sauce
• salt and pepper to taste

Instructions

1. In a large skillet over medium heat, melt butter and saute onions until translucent. Transfer onions to a 9x12 inch casserole dish and sprinkle cheese over onions. Spread butter on both sides of the bread, then lay the bread over the cheese.
2. In a medium bowl combine milk, soup, soy sauce, salt and pepper. Mix well and pour over bread. Cover and refrigerate over night.
3. Preheat oven to 350 degrees F (175 degrees C).
4. Bake in preheated oven for 40 minutes.