Creamy leek and cheese pasta

Name: Creamy leek and cheese pasta
Prep time: 20 min
Total time: 20 min
Cuisine: European, Italian
Ingredients: 250 g spaghetti; 1 stalk leek; 2 cloves garlic; 0.5 onion; 60 g cream cheese; 800 ml vegetable broth; 20 g pine nuts; 30 g Parmesan cheese; 2 tsp butter (for frying); 2 tsp olive oil (for frying); salt; pepper