In a saucepan, bring 1/3 cup (75 mL) water and sugar to a boil. Add basil stems, chili and lemon zest, remove from heat. Allow the syrup to cool to room temperature then refrigerate for 15 min. or up to 24 hrs. Remove basil stems and discard. In a bowl, toss melon with the chilled syrup. Add salt and basil leaves and gently toss. Drizzle with olive oil and serve.