Creamy spaghetti with bacon, beans and mushrooms

Boil pasta until just tender. Add beans for last 4 minutes of cooking. Drain. Return pasta and beans to pan. Pan-fry bacon in a pan until golden. Transfer to a plate. Lightly spray same pan with oil and cook mushrooms until golden. Add garlic and cook for 30 seconds. Add mushroom mixture, bacon and sour cream to pasta and beans. Top with parmesan cheese to serve.