I have happy memories of this dish when Joel lived with us on 20th Avenue. He would get his mother's fabulous leftovers from her catering jobs. Those made for delicious stroganoffs. Rumour has it Montreal Steak Spice takes a roll in her roast flavour profile . . .
1 sliced onion
1 can of sliced mushrooms, drained
Remainder of last night's roast cut into strips
Salt & Pepper
When beef is warmed through, add:
½ - 1 cup sour cream
1 T Dijon mustard
Stir through, serve with egg noodles and peas.