Grilled Watermelon Salad

Name: Grilled Watermelon Salad
Ingredients: 1 large fresh basil sprig; 1/3 cup plus 1/2 cup extra-virgin olive oil plus more for brushing; 3 1/2'-thick slices seedless watermelon, rind removed, each cut into 6 wedges for a total of 18 wedges; 1/4 cup fresh lime juice; 1 tablespoon honey; Kosher salt and freshly ground black pepper; 3/4 pound pea sprouts or watercress (tough stems removed; about 12 cups); 36 Pickled Radishes (click for recipe), cut into eighths; 1/2 cup (4 ounces) queso fresco, crumbled; 1/4 cup (1 ounce) shelled pumpkin seeds (pepitas), toasted