Pennsylvania Dutch Burger | Savory

Ingredients

• 2 tbsp butter, divided
• 2 cups thinly sliced yellow onions
• 1/2 tsp salt divided
• 1/2 tsp ground black pepper divided
• 1/2 cup mayonnaise
• 1 1/2 tsp minced garlic
• 1 1/2 tbsp lemon juice
• 1 lb ground beef (85% lean), molded into 4 patties
• 4 slices smoked Gouda cheese
• 1 small tomato
• 4 Kaiser rolls