1. Moisten the rim of the glasses with a wedge of grapefruit.
2. Dip the rim into golden sugar or brown sugar for a festive frosted effect.

Infusion Preparation:

1. Mix freshly squeezed grapefruit juice (about 15 cl) with Voatsiperifery pepper grains.
2. Let infuse for 5 minutes, then strain to remove the pepper pieces.

Cocktail Preparation:

1. In a shaker, combine the gin, pepper-infused grapefruit juice, and cherry syrup.
2. Add a few ice cubes and shake vigorously.

Serving:

1. Fill the glasses with ice cubes.
2. Pour the strained mixture into the glasses.
3. If a lighter version is desired, top with a splash of tonic water.

Decoration:

1. Add a spiral of grapefruit zest to each glass.
2. Place a fresh thyme sprig and optionally a cinnamon stick for an aromatic and festive touch, along with a few cherries in the glass.