Blue Cheese Stuffed Burger with Red Onion and Spinach
1 lb. ground beef
1Tbs. Worcestershire sauce
1 tsp. freshly ground pepper
1/3 to ½ cup crumbled blue cheese (approx. 2oz.)
1 medium red onion, sliced crosswise
1 cup baby spinach
4 hamburger buns split
In a bowl combine beef, Worcestershire sauce, and black pepper. On waxed paper, shape into eight thin 4-inch-diameter patties. Place 1 tbs. of the blue cheese in the center of four patties, top with remaining four patties and pinch edges to seal.
Brush onion slices with olive oil and sprinkle with salt.
Place burgers and onions directly over medium high heat and grill 5 minutes per side, until no pink remains in burger. Brush cut sides of burger buns with olive oil. Grill cut side down the last minute of grilling.
Serve burgers on buns with grilled onions, spinach and remaining blue cheese. Serves 4