Double Burgers with Mushrooms and Cheese Sauce | RICARDO

Ingredients

• 1 lb (454 g) white button mushrooms, cut into thick slices
• 3 tablespoons (45 ml) butter
• 1/2 cup (125 ml) shallots, thinly sliced
• 1 clove garlic, finely chopped
• 1 sprig fresh thyme
• 1/2 cup (125 ml) beef or chicken broth
• 2 tablespoons (30 ml) Worcestershire sauce
• 2 tablespoons (30 ml) sherry vinegar
• Salt and pepper
• 3 cups (750 ml) grated yellow sharp cheddar cheese (approximately 280 g / 10 oz)
• 1 tablespoon (15 ml) cornstarch
• 1 can 370 ml evaporated milk
• 1 1/2 lb (675 g) lean ground beef
• 4 kaiser rolls or hamburger buns
• Arugula