220 gm rump steak (or sirloin steak), at room temperature 3 potatoes, washed, with skin on, cut into 1½ cm dices a knob of butter 2 Tbsp vegetable oil 6 button mushrooms, thinly sliced 100 gm mixed salad vegetables
Mustard sauce:.
2 Tbsp whole egg mayonnaise sauce 1 tsp wholegrain mustard 1 tsp water ½ tsp sugar
Marinade:
1 Tbsp light soy sauce 2 tsp Worcestershire sauce 1 tsp Shaoxing wine or sherry wine pepper, to taste
Instructions 3.2.1311
