If you have a cryo or chamber vacuum sealer, seal the goose breasts in a bag with marinade ingredients. Otherwise, place these ingredients into a bowl and let the goose marinate. Marinate the goose for three to five hours, regardless of which method you use.
Using a sous vide cooker, sous vide the breasts (still sealed up with marinade, if possible) for 2-1/2 hours at 118 F. Remove the meat and pat it dry.
Reverse-sear the goose on a 600 F grill, flat top, or skillet for one minute per side. It helps to put a grill weight on the breast when searing.
Lightly tent the meat with aluminum foil and allow it to rest for 15 minutes before carving.
To make the beurre blanc, add two cups of wine, the juice from 1/4 lemon, garlic, salt, and black pepper to a medium saucepan. Bring it to a simmer. Once reduced to a third or quarter of the original amount, add one cup of heavy whipping cream. Continue to reduce until, again, the amount is approximately half, then add one cup of pitted dark cherries and one tablespoon of brown sugar. Continue to reduce until one-third of the original amount. Then, turn off the heat. Slowly stir in one pound of room-temperature pats of butter.
To serve, place the beurre blanc at the bottom of the plate or atop the carved goose. Garnish with fresh basil if you’d like.