Peel the onions and cut into fine rings. Core and wash the half bell pepper and cut into small pieces. Core the hot pepper and cut into small pieces.
In a small bowl, combine the juniper berries, peppercorns, allspice, and bay leaf.
Pour the vinegar and white wine into a saucepan and bring to a boil over medium-high heat. Season with salt, ground pepper, and the sugar. Add the onion rings and cook covered for about 5 minutes over medium heat until translucent. Remove from heat and let cool for about 5 minutes.
Stir the olive oil into the cooled vinegar mixture. Add the bell pepper, hot pepper, and the spice mixture.
Pour the entire marinade over the Harzer cheese in the bowl. Cover and refrigerate for at least 1 to 2 hours, or preferably 24 hours.
Remove from the refrigerator approximately 1 hour before serving.