Place the shallot in a fine-mesh sieve and quickly rinse with cold water. Allow to drain, then place in a medium bowl. Add vinegar and warm water, and let the shallot mixture sit for 2 minutes.
Whisk in oil, honey, both mustards, thyme, garlic, salt and pepper. Taste and adjust the salt and vinegar as needed.
Cover and refrigerate remaining dressing for up to 1 week.
To make a crunchy and refreshing green salad, toss Little Gem lettuce (or your favorite variety of baby lettuce), thinly shaved fennel, tender dill fronds, whole cilantro and parsley leaves, 1-inch pieces of chives and dressing. Season with salt and freshly ground black pepper. Delicately mound onto a serving platter and serve immediately.
https://cooking.nytimes.com/recipes/1027003-house-dressing