Beef Stroganoff with Straw Potatoes
12 servings · 4 × 6 inMustard Sour Cream Sauce
89 ml unsalted butter
89 ml all-purpose flour
15 ml dry mustard powder
710 ml beef stock
175 ml sour cream
Beef
89 ml unsalted butter
3 small yellow onion, thinly sliced
2040 g beef tenderloin, cut into strips about 8 cm x 2.5 cm x 3 mm
kosher salt, to taste
black pepper, to taste, freshly ground
Straw Potatoes
4 russet potatoes, peeled and cut into 3 mm matchsticks
kosher salt, to taste
30 ml parsley, finely chopped
1.5 l canola oil, for frying (to a depth of 4 cm)