There's something undeniably satisfying about biting into their crunchy exterior and savoring the tender, flavorful onion ...

Heavily cover the onion rings with pepper and smoke, grill or bake for about 90 minutes at 250-350 degrees. To make the spicy sriracha mayo, combine 2 T of mayo, 1 T of sriracha sauce, and 1 tsp ...

Add the sugar and crank up the heat to caramelize the onions. Add the vinegar and cook to a thick syrup. Check seasoning. Split the focaccia and spread on both sides with the mayonnaise.

You'll need to prepare the pickled red onion 24 hours before you want to serve this delicious vegetarian starter. Chardonnay makes a superb wine match.