How to Make It
In a medium bowl, combine 3 tablespoons of the white wine vinegar with 3 tablespoons of water and 1/2 teaspoon of salt. Add the figs and let stand at room temperature for 1 hour (or refrigerate for up to 4 hours). Drain the figs, reserving the pickling liquid.
In a large bowl, whisk the reserved pickling liquid with the remaining 1 tablespoon of vinegar and the Dijon mustard. Whisk in the olive oil and season with salt and pepper. Add the romaine and figs and toss to coat. Serve right away.