Make the garlic sauce ahead of time, even the day before, if you like. Whisk the cream and creme fraiche together until smooth, then add the remaining ingredients. Chill for a minimum of 2 hours, so the flavors meld.
Sauté the onion for about 4 minutes then add the mushrooms until cooked, add salt and pepper to taste. Remove from heat.
Serve the mushrooms, with the garlic sauce poured over the top, with a slice of bread in the side of the bowl (as served at the German Christmas market).
DID YOU MAKE THIS RECIPE?Please leave a review by clicking on the RATE button above in the purple header or share a photo and tag @ChristinasCucina on Instagram!