Mushroom Swiss Burger

Ingredients:

• 1 pound ground beef (80% lean)
• Salt and pepper, to taste
• 1 cup sliced mushrooms
• 1 onion, thinly sliced
• 4 slices Swiss cheese
• 4 hamburger buns
• Mayonnaise and mustard for spreading

Instructions:

• Season the ground beef with salt and pepper and form 4 patties.
• In a separate pan, sauté the sliced mushrooms and onions until they’re caramelized and tender.
• Grill the burger patties to your desired doneness.
• During the last minute of cooking, place a slice of Swiss cheese on each patty to melt.
• Toast the hamburger buns on the grill for about 1 minute.
• Assemble the burgers with mayonnaise and mustard on the bottom bun, followed by the patty with melted cheese, and a generous portion of the mushroom-onion mixture.