Rub your mint leaves around the rim of your glass, then rip them up and place them inside the glass.
Add your strawberries, then use a muddler or the back of a wooden spoon (or something of that nature) to squash the strawberries and to muddle the mint.
Put your rum, sugar syrup and lime juice in your glass, fill the glass 3 quarters of the way with your crushed ice then give the mixture a quick stir.
Top the glass up with your soda water, add a little more crushed ice and then finish with a final sprig of mint. Enjoy!