Step 1

Light a grill. In a medium bowl, gently mix the avocado with the cucumber, lime juice, minced jalapeño, cumin and the 1/4 cup of olive oil. Season the salsa with salt and pepper.

Step 2

Brush the watermelon slabs with olive oil and season with salt and pepper. Grill over high heat, turning once, until nicely charred on both sides, about 4 minutes total. Transfer to a platter. Spoon the salsa on the watermelon and top with the cilantro leaves, dill sprigs and sliced jalapeño, if using. Serve right away.