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["In a medium bowl, combine the first 7 ingredients, mixing well.", "Shape mixture into 8 equal-size thin patties.", "Spoon about 2 tablespoons each mushrooms, shredded cheese of choice, and onion or green onions onto the center of 4 patties, allowing a 1/4 to 1/2-inch rim of uncovered meat around the outside edges of each patty.", "Top each stuffing-topped patty with a second meat patty, sealing the two patties of each burger together by pinching with the fingers.", "Pan-fry, broil, or grill burgers as desired about 6 to 7 minutes total for medium rare and about 8 to 9 minutes for medium done burgers, turning each once.", "(Pan-fry burgers over moderate heat.", "Broil burgers about 6 to inches from heat source.", "Grill burgers over medium hot (charcoal) coals or medium setting of a gas grill about 8 inches above heat source.)", "Serve burgers in toasted buns with desired condiments and garnishes.", "Note: May wish to add about 2 tablespoons milk or water to chicken or turkey as both are more dry in texture than ground beef.", "Note: If using fresh mushrooms, place in a small heavy skillet with a few drops of water; cover loosely with aluminum foil and""sweat"" over low heat for 2 to 3 minutes or until mushrooms are crisp tender but not soft and mushy.", "Note: 3-Cheese Gourmet Cheddar Blend consists of Natural Wisconsin, New York Sharp, and Vermont White Cheddar cheeses.", "Country Casserole 4-Cheese Blend consists of Cheddar, Process American, Monterey Jack, and Muenster cheeses.", "Variations: Use favorite commercial salsa in place of chili sauce in meat mixture.", "Omit seasoned salt; add salt and chili powder, if desired.", "Use Nacho and Taco-Cheese Blend; may add some finely snipped cilantro leaves to cheese, if desired.", "Omit chili sauce and seasoned salt from meat mixture; add Cavender's Greek style seasoning to taste to meat mixture.", "Use crumbled feta cheese with basil and sun-dried tomatoes with the mushrooms and onion or green onions."]
