Prepare a plate. Transfer the neck and giblets from the goose cavity to the plate, and save for making stock later. Use a pair of poultry shears to trim the neck skin. Do not trim any skin from the bottom of the goose, because it will keep the meat moist during roasting.

Place goose on a working surface or cutting board. Use a toothpick to prick the goose skin on the breast and the thigh without piercing the meat, as many times as possible or at least about 1/3 inch (1 cm) apart. Note, the thickness of goose skin is not consistent, so start slow and do not prick too deep. If the skin is too tough to prick through, let the goose rest at room temperature for 30 minutes, or use your hands to massage the skin to loosen it up.

Rub both sides and the inside of the goose with a generous amount of sea salt.

Stuff citrus inside the goose, using as many fruits as you can. Use a few toothpicks to seal the bottom of the goose, to secure the fruits inside. Place goose onto the V-rack, breast side up.

Bake until the skin turns golden brown, 8 to 10 hours. You do not need to flip the goose or monitor the process.

If you’re going to serve the goose later, remove the goose from the oven. Place the goose in a cool place, loosely covered with aluminum foil, if you’re going to serve it the same day. Alternatively, you could let the goose rest for 30 minutes, then carve it into breast and leg pieces. Use aluminum foil to wrap the pieces, seal them in Ziplock bags, and store them in the fridge for up to 3 days.

While resting (or reheating) the goose, cook the fruit sauce. Dissolve potato starch in a few tablespoons of the sparkling wine.

Heat the rest of the sparking wine with the ginger powder in a small saucepan until bringing to a simmer. Turn to medium low heat and let simmer for 10 minutes so that the alcohol evaporates. Add the black currant jam and a pinch of salt. Stir and mix so that the jam incorporates with the wine. When the liquid comes to a simmer, taste it and adjust the flavor by adding more wine or jam.

Stir the cornstarch slurry again so that the starch fully dissolves. Slowly pour half of the slurry into the sauce, stirring at the same time. Continue adding more slurry to get the sauce to the desired thickness.

Remove the goose from the oven and let it rest for 15 to 30 minutes for an un-carved goose. You don’t need to rest it if you’ve already carved the goose. Do NOT cover the goose with foil. The stuffing will keep the meat hot.

Transfer the goose onto a large cutting board, carve, then slice the breast meat into bite-size pieces.

Serve the goose hot with the fruit sauce on the side.