Thinly slice the shallot and place in a bowl. It's best if the rings are separated. Pour apple cider vinegar over the shallots and let sit for 15-20 minutes.
Add honey and stir into the vinegar until dissolved. Add the minced garlic, olive oil, crushed red pepper, and thyme.
Pour over roasted vegetables and serve.
Leftovers can be stored in a covered jar in the refrigerator for up to 5 days. If the oil solidifies in the refrigerator, set out at room temperature or slightly warm in a pot on the stove prior to serving.
Notes
Other vinegars can be used such as red wine vinegar. Apple cider vinegar will give a slightly sweeter result.