Beef Stroganoff with Straw Potatoes
by Nadia Kim
8 servings
Mustard Sour Cream Sauce
- 59 mlunsalted butter
- 59 mlall-purpose flour
- 10 mldry mustard powder
- 475 mlbeef stock
- 120 mlsour cream
Beef
- 59 mlunsalted butter
- 2small yellow onion
- 1360 gbeef tenderloin
- kosher salt
- black pepper
Straw Potatoes
- 4russet potatoes
- kosher salt
- 30 mlparsley