The night before, place the mangoes in the fridge to chill. If not, a few hours will do too.
In a blender, combine milk, yogurt, mango cubes, banana, rolled oats, 1 tablespoons sugar (or honey) and ice cubes. Puree until smooth. Taste and adjust with more sugar (or honey) if needed. Blend again. Pour into serving glasses. Garnish with little rolled oats if desired. Serve immediately.
Notes
Make sure both the mangoes and banana are ripe before using.
If you can’t find fresh mangoes, use canned mango puree or pulp. You can find that in Indian supermarkets or online. But you will want to reduce the amount of puree and sugar in the recipe.
Rolled oats have been processed, so they can be eaten raw. But steel-cut oats are unprocessed. Make sure to get the right type.
Cumin is in the lassi at Dishoom. But I don't like cumin, so I skipped that. If you like, you can add a dash of ground cumin.