Sheet Pan Soy-Marinated Flank Steak with Savory Smashed Potatoes – Momofuku Goods

Ingredients

• 1 1/2 lbs flank steak (try to get a nice center cut with an even thickness)
• ½ cup Momofuku Soy Sauce
• 3 tablespoons lemon juice (or about half a lemon)
• 2 cloves garlic, chopped or grated
• Momofuku Savory Seasoned Salt
• ¼ cup + 3 tablespoons olive oil
• 2 1/2 lb small potatoes
• 1 medium shallot, chopped
• 2 tablespoons rice vinegar
• ¼ cup wide leaf parsley, chopped (packed)
• ½ cup sour cream