Ingredients:
- 1 Hass avocado, peeled and cut into 1/3-inch pieces
- 1 cup finely diced hothouse cucumber
- 3 tablespoons fresh lime juice
- 1 tablespoon minced seeded jalapeño, plus very thinly sliced jalapeño for garnish (optional)
- 1/4 teaspoon ground cumin
- 1/4 cup extra-virgin olive oil, plus more for brushing
- Kosher salt
- Pepper
- One 4-pound watermelon, quartered lengthwise and cut crosswise into 1-inch-thick slabs
- 1/2 cup cilantro leaves
- 1/2 cup small dill sprigs
