Why it works
Sweet potato can make bone-dry, lean wines feel sour if the dish is sweet. Off-dry Riesling works here because its gentle sweetness, low alcohol, and bright acidity cool spice, flatter salt, and refresh rich sauces. That makes the match feel deliberate: letting a little sweetness flatter salt and savoriness, staying in the same weight class as the dish, with the wine refreshing the next bite rather than stealing the spotlight.
Wine style
A lightly sweet, high-acid white style for spice, salt, pork, and aromatic cuisines.