To make a watermelon feta mint and chile recipe, first you need to prepare the ingredients. First, you'll need the following ingredients: 1 cup (240 ml) water, 1 teaspoon (2.5 g) kosher salt, and 1 tsp. (0.5 mg) dried fennel seeds. You can also use frozen watermelons if you don't have fresh ones on hand. Wash the mint leaves and cut them into small pieces. Cut the fresh mint in half and add it to the bowl of water. Add the olive oil and salt and pepper to taste. Toss everything together until everything is coated. Pour the mixture into jars and refrigerate until you are ready to use it.