Step 1: Begin by washing your watermelon thoroughly under cold water to remove any surface dirt.
Step 2: Place the watermelon on a stable cutting board. Trim off both ends to create a flat base. Stand the watermelon upright and carefully slice downwards to remove the rind in strips, following the curve of the fruit. Aim to remove all white parts, leaving only the vibrant red flesh.
Step 3: Once the rind is removed, cut the watermelon flesh into thick slabs, about 1-inch thick. Then, cut these slabs into 'fries' shapes, roughly 1 inch by 3-4 inches long. Pat gently with paper towels if the watermelon is very watery.
Step 4: Arrange the watermelon fries in a single layer on a large platter or baking sheet to ensure even seasoning.
Step 5: In a small bowl, combine the chili-lime seasoning, optional cayenne pepper, and a tiny pinch of sea salt. Mix well.
Step 6: Drizzle the fresh lime juice evenly over all the watermelon fries.
Step 7: Evenly sprinkle the combined seasoning mixture over the lime-juiced watermelon fries. Gently toss if needed to distribute the seasoning.
Step 8: If desired, sprinkle with fresh chopped mint leaves for an added layer of freshness and a beautiful pop of color.
Step 9: Serve immediately and enjoy! These spicy watermelon fries are best enjoyed fresh.