Preheat 2 t oil over medium high heat in a large oven save pan.Chop one medium onion and 1 pound of sausage of your choice into ¼ inch medallions. I used Butterball Smoked Sausage.Add the onion and sausage to the pan. Cook until onion is clearing nicely and sausage is browning. About 5 minutes.Add 2 cloves of minced garlic and cook another 30 seconds.Add 1 – 14 oz can chicken broth, 1 – 10½ oz can RoTel, ½ cup sour cream, ½ t salt and ½ t pepper. Mix well. Add 8 oz.(2 cups) of dry pasta of your choice.Bring to a boil with medium high heat then decrease heat to low. Cover and simmer. Stir occasionally and cook until pasta is tender. About 15 minutes. If you are approaching the end point for the pasta and too much fluid is present, uncover and increase heat to medium high for the last few minutes.Add ½ cup of Monterrey Jack cheese and mix in. Sprinkle 1 cup of Jack cheese on top.Place under broiler until cheese in melted an browning some.Garnish with chopped green onions if desired.