Portobello Mushroom Ravioli with Prawns

Name: Portobello Mushroom Ravioli with Prawns
Ingredients: 20 large prawns, peeled and deveined; 12 ounces prepared fresh cheese ravioli; 7 large portobello mushrooms, sliced; 3 cloves garlic, minced; 3 tablespoons capers; 3/8 cup butter; 5 fluid ounces white wine; 2 tablespoons olive oil; freshly ground black pepper; 2 tablespoons grated Parmesan cheese; 1/2 lemon, juiced