Adapted from Tart and Sweet:

Yield: 4 half-pints

About 4 heads of garlic, separated into cloves, peeled and trimmed

1 cup white wine vinegar
1/4 cup white vinegar
3/4 cup water
1 Tbsp kosher salt

Per half-pint jar:
1 thick slice lemon
1 rosemary sprig
1 thyme sprig
1 Tbsp yellow mustard seed
1/2 tsp chili flakes
1 tsp coriander seed
1 tsp fennel seed
1/8 tsp vegetable crisper granules

Bring vinegar solution to boil. Pack ingredients into hot jars. Ladle hot brine into jars, leaving 1/2" headspace.

Process 15 minutes.