1 tablespoon kosher salt or other coarse salt
1 1/2 teaspoons ground chile pepper
Zest and juice of 1 lime
1 (10-pound) watermelon, cut into wedges
Lime wedges and mint leaves for garnish (optional)
Combine the salt, chile pepper, and lime zest in a mortar and pestle. (If you don't have a mortar and pestle, you can finely chop the lime zest and use a fork to mix it with the salt and chile powder.)
Arrange the watermelon wedges on a platter and drizzle with lime juice. Sprinkle the chile mixture on top. Garnish with lime wedges and mint leaves, if desired.
Serve immediately or refrigerate until ready to serve.