Turkey roulade with pancetta and porcini sauce

Name: Turkey roulade with pancetta and porcini sauce
Prep time: 10 min
Cook time: 50 min
Total time: 50 min
Yield: 8 portions
Ingredients: 1 sprig fresh rosemary; 600 g turkey breast fillet, skinless, boneless; 8 processed cheese slices; 260 g pancetta; 1 garlic clove; 1 shallot; 30 g butter; 300 g water; 200 g dry white wine; ½ vegetable stock cube (for 0.5 l); 20 g dried porcini mushrooms; 5 drops Worcestershire sauce; 50 g cream, min. 30% fat; 2 pinches freshly ground black pepper