Rinse gooseberries and pluck off the stems. Boil the berries with a quarter of a liter of water and simmer on low heat for about 3-5 minutes until soft. Cool and strain the cooked fruit through a sieve. Add sugar, butter and lemon peel to the gooseberry puree form and mix everything together well.
Serve the sauce warm as an accompaniment to fish, duck, goose or grilled poultry.