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1
Using a large skillet, heat the green chile sauce over high heat.
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2
Stir in the green chiles and chopped onion.
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3
Add chicken breasts and spoon sauce over.
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4
Add salt and pepper to taste.
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5
Put a lid on the skillet and reduce heat.
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6
Simmer 5 minutes.
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7
Remove the lid and, using tongs, turn the breasts in the sauce.
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8
Put the lid back on and continue cooking about 10 minutes, until the chicken in cooked through.
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9
Meanwhile, prepare the mashed potatoes and keep them warm.
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10
To serve: place mashed potatoes and chicken on plates.
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11
Stir sauce and spoon over, covering the chicken and potatoes with sauce.
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12
Sprinkle with crumbled cheese.