Instructions: COOK ground beef and onion in 10-inch skillet, stirring frequently, until beef is brown; drain.

MIX baking mix, milk, garlic salt, pepper and eggs in medium bowl with fork until blended (mixture will be lumpy). Stir in beef mixture and 1/2 cup of the cheese.

HEAT margarine in 10-inch skillet until melted and bubbly. Gradually pour beef mixture into skillet. Cover and cook over medium-low heat 12 to 17 minutes or until almost set. Top with tomatoes; sprinkle with remaining 1 cup cheese. Cover and cook 3 to 7 minutes or until cheese is melted. 8 servings.

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