1. Fill a large stockpot with water & bring to a boil.
2. Meanwhile, wash potatoes thoroughly & cut into 1″ inch pieces.
3. Once boiling, add potatoes to water & reduce heat to medium. Cook 30 minutes.
4. 8-10 minutes before potatoes are done, add cauliflower to stockpot.
5. Once potatoes & cauliflower are fork-tender, remove from heat & drain. Return cauliflower & potatoes to stockpot.
6. Add yogurt & milk to stockpot. Mash until ideal consistency is reached.