Beef Stroganoff with Straw Potatoes

by Nadia Kim

12 servings

Mustard Sour Cream Sauce

• ≈ 85 gunsalted butter
• ≈ 47 gall-purpose flour
• ≈ 6 gdry mustard powder
• ≈ 720 gbeef stock
• ≈ 170 gsour cream

Beef

• ≈ 85 gunsalted butter
• ≈ 210 gsmall yellow onion
• 2040 gbeef tenderloin
• kosher salt
• black pepper

Straw Potatoes

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