"This is one packed potato! With veggies, roast beef and the potato itself, you've got everything you need for a one-dish meal. —Taste of Home Test Kitchen..."
INGREDIENTS
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4 large baking potatoes
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1-1/2 cups frozen pepper strips
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1 cup chopped onion
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1/4 cup butter, cubed
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1 pound sliced deli roast beef, cut into thin strips
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1 cup (4 ounces) shredded Colby cheese
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1/4 cup mayonnaise
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3/4 teaspoon prepared horseradish