I have to say, when I am really being lazy, I add the onions and flour to the sausage, directly on top, fry that up for a few minutes until it gets gummy, then add the water and flour. It works pretty well. Never had any complaints.
I'm feeling bearish, and I'm packing a Wusthof Grand Brisket slicer from MABA
"perhaps...but then again...maybe not..."