Kasespatzle (Spaetzle Cheese Noodles)
Heat butter in frypan, add onions, and brown lightly.
Toss cheese with dry mustard.
Add cooked noodles to cooked onions and cheese; mix well.
Place mixture in an ovenproof casserole.
Bake at 300℉ (150℃). for 20 to 30 minutes or until hot and bubbly.
Sprinkle top with chopped chives before serving.