12 oz. ramps with greens (about 3 bunches)
3 C. cider vinegar (5% acidity)
2 tsp. pure kosher salt
1/2 C. sugar
2 tsp. fennel seeds
2 tsp. yellow mustard seeds
1 tsp. whole black peppercorns
1 tsp. hot pepper flakes, or more to taste

Prepare for water-bath canning: Wash the jars, keep them hot in the canning pot, and put the flat lids in a bowl. Wash the ramps well and trim off any damaged leaves. Cut the tops off so that the bulb ends will fit upright in your canning jar with 1/2 inch headspace at the top. Arrange the leafy tops into four stacks. In a saucepan, bring the vinegar, 1 C. water, the salt, sugar, and spices to a boil over high heat, stirring to dissolve the salt and sugar. Using a jar lifter, remove the hot jars from the canning pot, carefully pouring the water from each one back into the pot, and place them upright on a folded towel. Working quickly, pack the ramp bulbs into one of the hot jars. Roll up each stack of leaves and stuff two rolls into each of the other two hot jars. Ladle the hot vinegar mixture into all the jars, leaving 1/2 inch headspace. Use a chopstick to remove air bubbles around the inside of each jar. Use a damp paper towel to wipe the rims of the jars, then put a flat lid and ring on each jar, adjusting the ring so that it’s just finger-tight. Return the jars to the water in the canning pot, making sure the water covers the jars by at least 1 inch. Bring to a boil, and boil for 10 minutes to process. Remove the jars to a folded towel and do not disturb for 12 hours. After 1 hour, check that the lids have sealed by pressing down on the center of each; if it can be pushed down, it hasn’t sealed, and the jar should be reprocessed or refrigerated immediately. Label the sealed jars and store.