A chile pepper adds a little heat to the sweet citrus syrup that tops the cool watermelon in this appetizer. You also could make this a side dish for any grilled entree.
In a small saucepan, combine lime peel, lime juice, honey, chile pepper, and stick cinnamon. Bring to boiling; reduce heat. Simmer, uncovered, for 2 minutes. Remove from heat. Cool to room temperature. Cover; chill in the refrigerator for at least 2 hours or overnight.
Just before serving, strain syrup; discard chile pepper and seeds and stick cinnamon. Arrange watermelon pieces in champagne flutes or wine glasses. Drizzle syrup over melon. If you like, garnish with lime twists/curls. Makes 12 servings.