Italian Burger

Ingredients

• 1 lb (500 g) whole red lentils, cooked, pureed
• 1 lb (500 g) mushrooms, roasted, pureed
• 1 lb (500 g) ground beef
• 1 cup (250 mL) onion, chopped, sautéed
• ¼ cup (60 mL) garlic, chopped, sautéed
• ¼ cup (60 mL) oregano, chopped
• ¼ cup (60 mL) basil, chopped
• ¼ cup (60 mL) flat leaf parsley, chopped
• 2 quarts (2 L) baby arugula
• 1 cup (250 mL) grated Parmesan cheese
• 1 cup (250 mL) grated Pecorino Romano cheese
• 3 ½ cups (875 mL) arrabbiata ketchup*
• 14 burger buns