Prepare lemonade according to the directions for homemade lemonade, set aside. Or prepare your favorite ready-made lemonade, about 8 cups worth.
Cut mangos off the pit, and remove the skin. Dice if desired. Reserve a few tablespoons of fresh mangoes to put in pitcher or glasses.
Add the mango and 3 cups of prepared lemonade, and the lime juice to a blender. Blend until smooth. Pour the mixture into a pitcher, for thinner lemonade, pour through a fine strainer or sieve.
Finish: Add the remaining 5 cups of lemonade to the pitcher and stir. Add fresh mangoes to glasses with ice for serving. Garnish with a lime.
Notes
You can add ice to the pitcher, or pour the mango lemonade over cups of ice to avoid diluting the lemonade. I prefer adding it to the glasses just before serving.