Vegetarian Stuffed Pasta Shells

"Sweet roasted red pepper sauce mixed with creamy mascarpone and earthy spinach all stuffed into perfectly chewy al dente pasta shells and baked with cheese. This stuffed pasta will be your new favourite recipe. It's quick and easy but everyone will think you put in so much effort! The only thing you need to do is make a simple tomato sauce, mix some creamy mascarpone with a jar of red pepper sauce and wilt some spinach. That's it! Oh. And boil some pasta. But that really doesn't count. It only takes a pan of water and 10 minutes!"