INGREDIENTS
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1 lb chicken breast, diced
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1 medium onion, chopped
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1 tablespoon vegetable oil
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8(8 inch) flour tortillas, softened
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1 1⁄2 cups grated monterey jack cheese or 1 1⁄2 cups Mexican blend cheese, divided
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1⁄4 cup butter
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1⁄4 cup flour
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1(15 ounce) can chicken broth
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1cup sour cream
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1(4 ounce) can chopped green chilies