Polish Casserole

This is one of those easy peasy recipes that is totally scrumptious.. It has all the flavor of a traditional Reuben sandwich, with the sauerkraut and Swiss cheese, but the kielbasa replaces the corned beef. 
4 C uncooked penne or farfalle pasta
1-1/2 lbs kielbasa, cut into half inch slices
2 cans condensed mushroom soup
16 oz sauerkraut 
3 C (12 oz) Swiss cheese, divided (or a combination of Swiss and Cheddar)
1-1/2 C milk
5 spring onions
2 Tbsp Dijon mustard
5 cloves garlic, crushed
Serve with rye bread and butter

Preheat the oven to 350 degrees.
Cook the pasta, drain and put in a large bowl. Add all the other ingredients, reerving 1 C of the cheese.
Divide between to two small baking dishes, or one large dish. Top with the remaining cheese and bake for about 45 minutes until hot and bubbly.