Put the penne in plenty of boiling salted water and cook for 7-9 minutes.
Meanwhile, heat olive oil in a saucepan. Sweat the chopped onion in it. After a few minutes, add the finely chopped garlic. Deglaze with the canned tomatoes and puree. Stir in the chilli pepper or cayenne pepper and olives. Season with salt and pepper. Bring everything to the boil, then add the basil, oregano and thyme.
Pour the crème fraîche in a cup and mix with some of the hot sauce to warm it up. Then stir slowly into the sauce.
Drain the penne through a sieve and melt the herb butter on it.
Serve the pasta with the sauce and sprinkled with parmesan.