Slice the onion and fennel into thin rings and sauté vigorously in the butter, deglaze with the beer, stir in the cream and finely chopped tarragon, and let the mixture reduce by half. Meanwhile, rinse your mussels in cold water, remove any that are broken or remain open, add them to the pot, season well with pepper and salt, put the lid on, shake vigorously so that the sauce and garnish also sit on top, set on high heat and cook briefly and vigorously until they open.
Serve immediately and finish each plate with some parsley. Serve with fresh fries and mussel sauce or fresh mayonnaise. A nice white beer on the side and you eat like a king! 😊
Tips
Test all your toppings, you will be amazed how many different flavors the mussel can get, and ambiance insured at the table! Do you have mussels left? Then remove them from the shell and save in the gravy. You can also impose them in vinegar or make mussel soup out of it!