This is one of the simplest but also tastiest sauces you can make. It's perfect when you have tomatoes that are starting to get a little old, soft and wrinkly. Just take those, cut them in half and place cut side up in a roasting tray. Drizzle with olive oil, some chopped garlic and shallots, and a little salt and pepper. Add some fresh herbs if you have them.
Roast at 200°C for about half an hour. The tomatoes should have softened quite a bit and released some liquid. Tip all the contents of the pan into a mixer. Add a little pinch of sugar and a little apple cider vinegar, and blitz until smooth. (Be careful, it's hot!)
Pour into a pot and cook until it's as thick as you like it. At this point, you could certainly add some browned beef mince if you'd like. Season to taste with more salt, sugar and vinegar.