Blue Cheese Stuffed Hamburgers
Recipe By : Land O Lakes Treasury of Country Recipes
Servings : 4

1 1/2 pounds ground beef
1/4 teaspoon salt
1/3 cup crumbled blue cheese
3 ounces cream cheese -- softened
1 tablespoon country-style Dijon mustard
4 onion buns
1 1/2 cups fresh mushrooms -- sliced 1/4-inch
2 medium onions -- sliced 1/8"
1/4 teaspoon salt
1/4 teaspoon pepper
1 tablespoon Worcestershire sauce
4 slices ripe tomato

In medium bowl stir together ground beef, 1/4 teaspoon salt and 1/4 teaspoon pepper. Form into 8 large 1/4-inch thick patties. In small bowl stir together blue cheese, cream cheese and mustard. Place about 2 tablespoons cheese mixture on top of each of 4 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 grilled mushrooms and onions.