Wash the limes with hot water. Then scrape off the peel as much as possible. Then halve the limes and squeeze out the juice.
Wash the mint, shake it dry and pluck the individual leaves from the stems. Now the strawberries are washed, cleaned and cut into pieces.
Mix the strawberries, rum, sugar, mint, lime juice and zest and leave to stand in the refrigerator for about 1 hour. Just before serving, add the sparkling wine and water and enjoy cold.