01 -
Turn your broiler to high and let it fully heat up.
02 -
Spread the tomatoes on a foil-covered, edged baking pan. Slide the pan onto a rack at least 6 inches under the broiler. Roast the tomatoes until their skins brown and they release liquid, shaking the pan once or twice so they brown evenly. This takes about 6–7 minutes.
03 -
Take the roasted tomatoes out of the broiler and let them rest until they’ve cooled completely.
04 -
Drain off any liquid from the tomatoes and pour them into a food processor. Toss in the thyme, oregano, garlic, chili flakes, and a bit of salt. Pulse a few times until the mixture is small bits, but don’t make it totally smooth.
05 -
Cut up the butter into pieces and add it to the tomato mix. Blend everything together until the butter is mixed in smoothly. If needed, scrape down the bowl's sides and blend for 25 to 30 seconds.
06 -
Spoon the butter into a small container with a lid. Use it right away or keep it in the fridge for up to a week.