This is based on a recipe from BBC Good Food. I've amended some of the ingredients, partly for convenience - I've also amended some of the cooking times as I prefer to let the bread pull up some of the juices rather than simmering them all off before hand.
A fairly simple pasta meal that's a bit different to the usual sauces. Additional mustard can be added for more of a "burn", but the mixture of fennel and lemon works quite well if you don't overpower it.
A simple sauce to go with pasta, can be made using puree or tinned tomatotes (tinned is better).
If you want to add some spice you can mix in dried chilli flakes and/or chopped chilli, whereas if you want to turn it into more of a meatball sauce, you can mix in some grated mozzarella