Mushroom and White Wine Cream Sauce

Name: Mushroom and White Wine Cream Sauce
Prep time: 10 min
Cook time: 30 min
Total time: 30 min
Yield: 300 g
Ingredients: 12 g dried porcini mushrooms; 30 g water; 100 g fresh portobello mushrooms; 50 g unsalted butter; 60 g shallots; 120 g dry white wine; ½ chicken stock cube (for 0.5 l); 200 g boiling water; 125 g single cream (approx. 18 % fat); 25 g plain flour; ¼ - ½ tsp fine sea salt; 2 pinches ground black pepper; fine sea salt