Peel off the garlic cloves and mash with a knife (if you want to cut into small pieces or press). Fill both in a high frying pan or roasting pan, drizzle with olive oil and season with pepper, paprika, Thai curry and let stand for approx. 10 minutes.
In the meantime, peel the onions and cut into small cubes. Chop the tomatoes too. Season both with a little salt and set aside.
Fry the marinated sausage slices, add the onion and tomato mixture and fry for approx. 2-3 minutes.
Add tomato paste and fry everything together again for 4-5 minutes.
Deglaze the whole thing with 250 ml of water. Bring everything to the boil once.
Add the tomatoes, ketchup and herbs. Let it boil again. If the sauce is too thick, you can add a little more water if you like.
Reduce the temperature and add 1 cup of creme fraiche and let it steep.
When the creme fraiche has dissolved, the sauce is ready.