"People can't get enough of these pop-in-your-mouth mini frittatas. They're a cinch to make, freeze well and the recipe easily doubles for a crowd. —Nancy Statkevicus, Tucson, Arizona..."
INGREDIENTS
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1 cup whole-milk ricotta cheese
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3/4 cup grated Parmesan cheese
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2/3 cup chopped fresh mushrooms
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1 package (10 ounces) frozen chopped spinach, thawed and squeezed dry
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1 large egg
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1/2 teaspoon dried oregano
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1/4 teaspoon salt
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1/4 teaspoon pepper
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24 slices pepperoni