8 cups cubed watermelon (1/2-inch pieces)
1 cup cubed peeled jicama (1/2-inch pieces)
1 tablespoon lime zest
1 jalapeno pepper, stemmed, seeded, deveined and minced
1 tablespoon chopped fresh chives
1 tablespoon sliced scallion, white and pale green parts only
1/4 cup roughly chopped fresh cilantro
1/4 cup thinly sliced fresh basil
2 tablespoons fresh lime juice
1 tablespoon fresh lemon juice
3 tablespoons extra-virgin olive oil
Kosher salt and freshly ground pepper
1/2 cup crumbled Cotija cheese