Cheesy Sausage with butter

1 lb spicy ground pork sausage (like Jimmy Dean hot sausage) 1 tablespoon vegetable oil 1 tablespoon butter 1 yellow onion , chopped 2 carrots , diced 3[...]

1 lb cooked Polish sausage or 1 lb kielbasa , cut in 1/2 inch pieces 1/2 cup chopped onion 1 (7 7/8 ounce) package cheesy scalloped potatoes mix (I used[...]

3 lbs potatoes , peeled and cut into 1/4-inch slices 1 lb bulk pork sausage 1 medium onion , chopped 1/4 cup butter , melted 2 cups shredded cheddar cheese (8[...]