In a skillet add butter over medium heat. Once butter is melted place kielbasa slices in the skillet making sure to have each piece flat. Cook on one side for about 2-3 minutes or until browned. Flip over and brown the other side, another 2-3 minutes. Cook frozen tortellini according to package

Push the kielbasa slices to the outer sides of the skillet and add in garlic and onion. Cook until translucent and fragrant, then add in asparagus and mushrooms to the pan. Cook for about 3 - 5 minutes and then add in can of diced tomatoes and green chilies, cajun seasoning, and salt / pepper. Turn heat down to low and add in half and half, giving everything a good stir and let sauce thicken a little, simmering for about 3 minutes. Add in cooked tortellini, stirring to let the sauce coat all the tortellini. Then add in grated parmesan. Serve right away with extra parmesan and pepper flakes on top