Beef Stroganoff with Straw Potatoes
4 servings · 4 × 6 inMustard Sour Cream Sauce
≈ 28 g unsalted butter
≈ 16 g all-purpose flour
≈ 2 g dry mustard powder
≈ 240 g beef stock
≈ 57 g sour cream
Beef
≈ 28 g unsalted butter
≈ 70 g small yellow onion, thinly sliced
680 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
≈ 850 g russet potatoes, peeled and cut into 3 mm matchsticks
kosher salt, to taste
≈ 7.5 g parsley, finely chopped
≈ 1420 g canola oil, for frying (to a depth of 4 cm)