Grated orange zest: 0. 5 tsp (0. 1 oz / 1g)
Dry-roasted coarsely crushed cumin seeds: 2 tsp (0. 1 oz / 4g)
Line a colander with three thicknesses of cheesecloth (about 16 inches/40 cm square) or a clean handkerchief.
Place the 1 cup (8. 5 oz / 240g) plain yogurt in the cloth, gather the four corners, and tie closed with a piece of kitchen twine. Hang the yogurt from a knob on a kitchen cabinet or sink faucet where it can drain into a bowl or sink.
Let it drain undisturbed for 2–3 hours.
Unwrap the thickened, drained yogurt and place it in a 1-quart (32 oz / 1000g) bowl.
Add the 1 cup (8. 5 oz / 240g) cultured buttermilk.
Add the 0. 5 tsp (0. 1 oz / 1g) orange zest, 2 tbsp (1. 0 oz / 30g) orange juice, 2 tbsp (0. 7 oz / 20g) dates, the minced green chilies, 2 tsp (0. 1 oz / 4g) cumin seeds, and 0. 75 tsp (0. 2 oz / 5g) salt.
Whisk everything together with a fork until the mixture is perfectly smooth and creamy.
Cover the bowl and refrigerate for at least 1 hour to allow the flavors to meld.
Peel the baked 12. 0 oz (340g) sweet potatoes or yams and cut them into precise 0. 5-inch (1. 25 cm) cubes.
When you are ready to serve the dish, gently fold the sweet potato dice into the chilled yogurt mixture.
Transfer to a serving bowl and garnish evenly with the 2 tbsp (0. 5 oz / 15g) toasted sliced almonds.
Serve cold alongside plain rice or your favorite roasted vegetables.
Do Not Skip the Draining Process: Draining the yogurt for the full 2–3 hours is crucial. Sweet potatoes and cucumbers release moisture when they sit, so starting with a thick, compressed yogurt base prevents your raita from becoming a watery soup.
Bake, Don't Boil: Always bake your sweet potatoes or yams in their jackets (skin on) rather than boiling them. Baking naturally caramelizes their sugars, deepens their flavor, and keeps the flesh firm so they hold their perfect 0. 5-inch dice in the creamy yogurt.
Fold Just Before Serving: To maintain the beautiful visual contrast and ensure the sweet potatoes don't turn mushy, always store the prepared buttermilk-yogurt mixture and the diced sweet potatoes separately. Gently fold them together right before bringing the dish to the table.