Silky Sweet potato and potato Mash - Thermomix

Ingredients
500g Water
300g Sweet potato, peeled and cut into pieces (approx. 3 cm)
300g Potato, peeled and cut into pieces (approx. 3 cm)
30g Butter, i used my Cafe de Paris Butter
30g Thickened Cream
1 teaspoon Salt
pinch of Pepper

Method
Place water into mixing bowl. Insert simmering basket, weigh sweet potato and potato into it, then cook for 17 min/Varoma/speed 2, until completely soft.
Carefully remove simmering basket with aid of spatula and set aside to drain. Discard cooking liquid.
Place butter and cooked potato into mixing bowl and blend 10 sec/speed 5.
Insert butterfly whisk. Add cream, salt and pepper, then whip for 30 sec/speed 4 or until smooth and silky. Remove butterfly whisk.