The BEST Rueben Casserole (Sausage)

The Best Rueben Casserole, SO EASY AND SO DELICIOUS!!!!!!!
I could easily eat the entire casserole and I don't jump and down for Sauerkraut but this was delicious.
Preheat oven 350
Things you will need
1 Can (10 3/4 oz.) Condensed Cream of mushroom soup
3/4 Cup Milk. 1/4 Cup Chopped Onion (small onion), 1 1/2 Tsp Mustard
1 Can (16 oz.) Sauerkraut, rinsed and drained
1 pkg (8 ounces) uncooked noodles
1 pound Link Sausage, cut in 1/2 " pieces (flavor of Your choice) uncooked
1 Cup Swiss Shredded Cheese
1/2 Cup Bread Crumbs, 2 Tbls butter, melted