Gourmet Patty Melts

By Suzanne

5.0 / 5

20min

25min

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1 pound ground sirloin
1 tablespoon Worcestershire sauce
2 cloves garlic minced, or more to taste
½ teaspoon salt
½ teaspoon ground black pepper
3 tablespoons unsalted butter
3 tablespoons olive oil
2 medium onions sliced
cooking spray
4 slices Cheddar cheese
4 teaspoons Dijon mustard
8 slices rye bread lightly toasted