Blue Cheese Stuffed Hamburgers With Fried Mushrooms And Onions

In medium bowl stir together ground beef, 1/4 teaspoon salt and 1/4 teaspoon pepper. Form into large 1/4-inch thick patties (you need 2 patties per burger).

In small bowl stir together blue cheese, cream cheese and mustard. Place about 2 tablespoons cheese mixture on top of each of half the patties. Top each with remaining meat patty. Press around edges to seal.

Place hamburgers in 10-inch skillet. Cook over medium heat, turning once, until desired doneness (12 to 15 minutes for medium). Place hamburgers on buns.

In same skillet with drippings place mushrooms and onions; add 1/4 teaspoon salt, 1/4 teaspoon pepper and Worcestershire sauce. Cook over medium high heat, stirring occasionally, until tender (4 to 5 minutes).

Meanwhile, place tomato slice on each hamburger; top with fried mushrooms and onions.