INGREDIENTS
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1 1/2 tablespoons chili powder
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2 teaspoons dried oregano leaves
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1 teaspoon ground cumin
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1 teaspoon salt
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1 pound beef top sirloin steak, about 3/4 inch thick
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4 flour tortillas (6 to 8 inches in diameter)
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3/4 cup reduced-fat sour cream
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1 tablespoon prepared horseradish
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4 cups shredded lettuce
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1 large tomato, chopped (1 cup)