Real mint sauce bears almost no resemblance to the sweet, jarred mint jelly familiar to a lot of home cooks. The traditional British version is sharp, vinegary, and genuinely savory - a proper condiment rather than a spoonful of sugar with mint flavoring.
Prep time: 10 minutes, plus resting | Makes: about 1/2 cup
This sauce keeps in the fridge for about a week in a sealed container. The mint will darken somewhat over time from the vinegar, which doesn't affect the flavor.
Pouring hot water over the finely chopped mint and sugar softens the leaves and helps release their oils more effectively than simply stirring everything together cold. This step, along with the resting time, is what separates a proper mint sauce from just finely chopped mint stirred into vinegar.
This is the traditional British accompaniment to roast lamb, spooned over the meat at the table rather than cooked into it. It also works well with grilled lamb chops, or as a bright, sharp counterpoint to other rich roasted meats.
Mint jelly, more common in American cooking, is a sweet, set condiment closer to a fruit preserve than a sauce, usually made with apple pectin and considerably less sharp than this vinegar-based version. Both pair with lamb, but they're genuinely different condiments rather than regional names for the same thing - if you've only had mint jelly, this sauce will likely taste sharper and more savory than expected.
This is mint at its most serious - a genuine condiment rather than a garnish. For more, see the complete mint guide.