Pork and Broccoli Cheeseburgers

Ингредиенты

• 1/4 cup (60 ml) mayonnaise
• 2 tbsp (30 ml) ketchup
• 1 tbsp (15 ml) prepared mustard
• 1 lb (450 g) lean ground pork
• 4 hamburger buns
• 2 tbsp butter
• 2 oz (55 g) processed orange cheese (Velveeta-style block), cut into 4 cubes
• 4 slices orange cheddar cheese
• 1/2 cup (50 g) mozzarella cheese, grated
• 1 cup (70 g) cooked broccoli, chopped