In large bowl, stir Bisquick mix, milk, 1/4 cup of the onions, the garlic powder and red pepper until soft dough forms. On surface sprinkled with additional Bisquick mix, pat dough to 1-inch thickness. Cut dough with 2 1/2-inch round cutter. Arrange rounds in skillet; sprinkle 3/4 cup of the Cheddar cheese evenly between rounds.
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