Ingredients
1
tbsp finely chopped shallot
1/2
tsp coarse-grain mustard
3/4
lb Bibb lettuce (3 medium heads), larger leaves torn into bite-size pieces
1/4
cup loosely packed small fresh tarragon leaves
Directions
1.
Whisk together vinegar, shallot, mustard, sugar, salt, and pepper until sugar and salt are dissolved, then add oil in a stream, whisking until emulsified.
2.
Toss lettuce and tarragon with just enough dressing to coat and serve remaining dressing on the side.
4.
Dressing can be made 2 days ahead and chilled, covered.