Muddle the strawberries, lime wedges, mint leaves and sugar until the strawberries and limes are pretty well smashed. Add the cachaça and pack in the ice to the rim, then top with a large dollop of whipped cream. Shake vigorously in the cocktail shaker for about 10 seconds, then pour it all back into the glass. Make a slit in the bottom of the strawberry and slide it onto the rim of the glass, then serve.