Cheesy Chicken with butter

2 cups of well flavored chicken stock 1 (14 ounce) can diced tomatoes with jalapenos 1 tablespoon butter 1 tablespoon vegetable oil 1 medium onion , diced 1[...]

1 1/2 lbs boneless chicken breasts 1/2 lb frozen spinach , chopped 1/3 lb smoked gouda cheese 1/4 cup nonfat milk 2 tablespoons butter or 2 tablespoons[...]