How to Make It
Peel mangoes; coarsely chop fruit. Process mango, orange juice, water, sugar, lime juice, and salt in a blender until smooth. Pour mixture into an 8-inch square baking dish. Freeze until firm, about 4 hours, scraping mixture with a fork every 30 minutes.
Divide mixture evenly among 8 small glasses. Drizzle with tequila, and sprinkle with lime zest.