Lentil Patty Melt – Lentils.org

Ingredients

• 5 Tbsp (75 mL) butter, softened
• 5 Tbsp (75 mL) mayonnaise, low fat
• 20 slices sourdough bread
• ½ lb (250 g) finely chopped walnuts
• 1 lb (500 g) whole red lentils, cooked
• 1 lb (500 g) mushrooms, roasted, minced
• 1 cup (250 mL) all-purpose flour
• 2 Tbsp (30 mL) onion powder
• 2 Tbsp (30 mL) garlic powder
• 1 Tbsp (15 mL) Worcestershire sauce
• 2 Tbsp (60 mL) olive oil
• 4 cups (1 L) yellow onion, small dice
• 10 slices of gruyere cheese
• 10 slices of Swiss cheese