Combine lime juice, cilantro, green onion, jalapenos and salt in a small glass bowl and stir to mix. Add bell pepper and watermelon and stir gently. Cover and refrigerate until ready to serve. This recipe makes 6 servings. Each serving contains approximately 30 calories, .6 gram protein, .4 gram fat, 7 grams carbohydrate, 0 milligrams cholesterol, 98 milligrams sodium and .25 grams dietary fiber.