This colorful mix is dressed with tomato water, which is made by draining pureed tomatoes for a day. It may look pale, but its flavor is astonishing: You'll want to spoon up every drop.
Peel mango and cut flesh from pit; discard pit. Cut flesh lengthwise into 1/4-inch slices. Toss with cucumber, tomatoes, chile, chopped basil, and oil. Season with salt and divide salad among 4 bowls. Divide tomato essence among bowls, garnish with remaining basil, and drizzle with more oil.