Preparation Blend vinegar, garlic, mustards, sugar, and 1/2 teaspoon each of salt and pepper in a blender until garlic is very finely chopped. With motor running, add oil in a slow stream and blend until emulsified. Slice beet paper-thin with slicer. Toss greens and beet in a large bowl with enough dressing to coat. Cooks' notes:•Vinaigrette keeps, chilled, 1 week. Bring to room temperature before using. •;Beet can be sliced 1 day ahead and chilled in a sealable bag. •Greens can be washed (but not torn) 1 day ahead and chilled in sealable bags lined with damp paper towels.
Preparation Blend vinegar, garlic, mustards, sugar, and 1/2 teaspoon each of salt and pepper in a blender until garlic is very finely chopped. With motor running, add oil in a slow stream and blend until emulsified. Slice beet paper-thin with slicer. Toss greens and beet in a large bowl with enough dressing to coat. Cooks' notes:•Vinaigrette keeps, chilled, 1 week. Bring to room temperature before using. •;Beet can be sliced 1 day ahead and chilled in a sealable bag. •Greens can be washed (but not torn) 1 day ahead and chilled in sealable bags lined with damp paper towels.