Heat a large skillet over medium-high heat. Cook and stir sausage and onion in the hot skillet until sausage is crumbly and browned, about 10 minutes. Drain grease and allow to cool slightly. Transfer sausage mixture into a large bowl. Stir in drained sauerkraut, 2 tablespoons bread crumbs, mustard, garlic salt, and pepper. Combine cream…