Summery watermelon and feta salad

Ingredients

• 1 ripe mini watermelon
• ½ cucumber (halved lengthways, seeds removed, then cut into half moons)
• 75g mixed radishes, thinly sliced
• 200g barrel aged feta cheese, crumbled
• Handful of fresh mint leaves, shredded
• Handful of fresh basil leaves (any large leaves torn)
• Zest of 1 unwaxed lemon
• Glug of fruity Greek olive oil
• Balsamic glaze
• Pitted kalamata olives, optional