Patty Melts - Canadian Beef | Canada Beef

Ingredients

• 2 tbsp (30 mL) butter
• 1 sweet onion, sliced
• 2 tbsp (30 mL) cider vinegar
• 2 tbsp (30 mL) dry bread crumbs
• 2 tbsp (30 mL) Worcestershire sauce
• Half a lightly beaten egg (about 4 tsp/20 mL)
• ¼ tsp (1 mL) salt and pepper
• ½ lb (250 g) Extra Lean or Lean Ground Beef
• Canola or sunflower oil
• 4 slices rye bread
• 4 slices Swiss cheese