Beef Stroganoff with Straw Potatoes

by Nadia Kim

8 servings

Mustard Sour Cream Sauce

• ≈ 57 gunsalted butter
• ≈ 31 gall-purpose flour
• ≈ 4 gdry mustard powder
• ≈ 480 gbeef stock
• ≈ 115 gsour cream

Beef

• ≈ 57 gunsalted butter
• ≈ 140 gsmall yellow onion
• 1360 gbeef tenderloin
• kosher salt
• black pepper

Straw Potatoes

• ≈ 850 grusset potatoes
• kosher salt
• ≈ 7.5 gparsley