Season the beef strips to taste with sea salt and black pepper.
Sea salt and freshly ground black pepper to taste, 2 pounds beef chuck roast or sirloin cut into strips
Melt some cooking fat and brown the beef for 1 to 2 minutes in a large skillet placed over medium-high heat.
⅓ cup full-fat coconut milk, Cooking fat
Add the green onions and cook for another 4 minutes.
4 green onions
Add the white wine. Bring to a boil then turn down the heat and cook, uncovered, until the liquid is reduced by half.
⅓ cup white wine
Add the beef stock. Bring to a boil, lower the heat, and simmer for 45 minutes or until the beef is cooked through but still tender.
1 cup beef stock
Add the mushrooms, coconut milk, and mustard to the skillet, and cook for another 5 minutes.
6 oz. mushrooms, ⅓ cup full-fat coconut milk, 1 tsp. Dijon mustard
(Optional) If you like a thicker sauce, add the tapioca starch now and stir it in well.
½ tbsp. tapioca starch
Season to taste once again and serve.