Step 1

In a medium saucepan on medium-low heat, add the pearl onions, vinegar, sugar, shallots, red onions, a pinch of salt, a few grinds of pepper and 1/4 cup water. Stir to combine, then cook until the onions are completely tender and caramelized, 40 to 45 minutes.

Step 2

Add the thyme and scallions to the cooked onions and refrigerate until ready to use. Serve on nachos, burgers, hot dogs, etc.