- 1 1/2 kilos grapes, without seeds (net weight)
- 750-1.000 g granulated sugar (start from 750 g sugar if your grapes are too sweet and reach the 1.000 g if they are too sour)
- 10 peppercorns
- zest from 1 lemon or vanilla or geranium (optional)
- juice from 1 lemon
To serve
- baguette slices, toasted
- fresh butter