2tablespoonsfinely diced red onionplus more to taste
3tablespoonsfinely chopped basil
3tablespoonsfinely chopped mint
3tablespoonsfreshly squeezed lime juiceplus more to taste
1teaspoonfinely grated lime zest
2teaspoonsminced ginger
1/2teaspoonminced green serrano chileplus more to taste
1/2tablespoonnatural saltplus more to taste
Pinch of freshly ground black pepper
Instructions
Put the 4 cups of chopped watermelon into your blender and purée on high for 30 to 60 seconds, until liquefied. Pour into a serving bowl. Add the 6 cups of diced watermelon and all the remaining ingredients. Stir to combine well. Tweak flavors to taste (you may want more onion, lime juice, chile, or salt).
Cover and chill in the fridge for at least 3 hours to allow the flavors to fuse and the vibrant red color to develop. Before serving, tweak flavors again (if it's too spicy, add some lime juice). Pass additional lime juice and salt at the table.