Meatloaf Patty Melts

2 cups	leftover pot roast
8 slices	sturdy bread
3 tablespoons	butter, plus more for the bread
2	medium onions, thinly sliced
8 ounces	sliced button mushrooms
2 cloves	garlic, minced
	salt and pepper to taste
8 slices	colby cheese (or swiss, or provolone, etc.)
	FOR THE SAUCE:
1/2 cup	mayonnaise
3 tablespoons	steak sauces
	dash Worcestershire sauce

1. Re-heat the pot roast in the microwave until just warm. Butter one side of all 8 slices of bread.

2. Melt 3 tablespoons butter in a large skillet. Add onions and mushrooms and cook over medium-high heat, stirring frequently, until onion is softened and mushrooms are browned. Add garlic; season with salt and pepper and cook and stir for 30 seconds. Remove from heat.

3. Heat a griddle over medium-high heat. Place a slice of cheese on the unbuttered side of 4 slices of bread. Top each slice with 1/2 cup of the pot roast, a generous portion of the onion and mushroom mixture, and the other slice of cheese. Repeat with all four sandwiches and top with the other slice of bread, buttered side out. Grill, flipping once, until both sides are browned and crispy.

4. Combine all sauce ingredients. Serve the sauce with the patty melts.

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