Watermelon Juice with Lemongrass

Thanks to watermelon's natural sweetness, this drink doesn't call for sugar.

4 lb watermelon, peeled and cut into cubes (12 cups)
1 Tbsp. + 1½ tsp. lemon juice, freshly squeezed
2½ tsp. lemongrass, finely grated
1½ tsp. fresh ginger, finely grated
coarse sea salt
ice cubes

Garnish:
lemongrass stalks, trimmed

Purée watermelon in a blender until smooth. Strain mixture through a fine sieve into a pitcher. Stir in lemon juice, lemongrass, ginger, and 1/8 tsp. salt.

Refrigerate until chilled, about 20 minutes.

Divide juice among 6 ice-filled glasses, and garnish with lemongrass stalks.

Makes 6 cups, serving 6.