Frikadelle with potato leek mustard stew

Ingredients

• 1 pack Garden Gourmet Frikadelle
• 600 g potatoes
• 1 big leek
• 1 large red onion
• 2 tbsp coarse mustard
• 150g plant-based milk
• 125 ml plant-based cooking cream
• 1/2 cube vegetable stock
• 2 tsp soy sauce
• 2 sprigs parsley
• 2 tbsp oil
• Some salt and pepper