Serve this super easy five ingredient crockpot appetizer recipe for applesauce kielbasa at the start of a hearty fall meal. It is rich and sweet and spicy, with brown sugar and mustard. If you really love mustard, add more types. I adore a fire-roasted garlic mustard i can only get at my local shop. You can use any fully-cooked sausage in place of the kielbasa if you'd like. Take a look at this sausage chart for more information about which sausages to use, and which should be cooked before serving and the ones that can be served straight from the package. If you'd like to make kielbasa at the last minute, make stovetop apple kielbasa. This recipe can also be served as a main dish over some rice pilaf or cooked pasta; anything to soak up the delicious sauce. In that case, cut the sausages into 2-inch pieces. If serving as an appetizer, use little toothpicks to get the sausages from the sauce, or serve it with small plates and tiny forks.