Meatballs with White Wine Mushroom Sauce

Name: Meatballs with White Wine Mushroom Sauce
Prep time: 35 min
Cook time: 35 min
Total time: 35 min
Yield: 6 portions
Ingredients: 80 g bread, slightly stale; ½ brown onion; 4 sprigs flat-leaf parsley; 1 tsp mixed herbs, dried; 20 g olive oil; 500 g beef rump steak; 20 g milk; 1 large egg; ½ tsp sea salt; ½ tsp black pepper, ground; olive oil; 60 g Parmesan cheese; 60 g white wine, dry; 1 tbsp cornstarch; 1 garlic clove; 1 shallot; 40 g butter, unsalted; 200 g fresh brown mushrooms; 1 pinch sea salt; 1 pinch black pepper, ground; 200 g heavy cream, 35% fat; 1 sprig flat-leaf parsley