Work ingredients into the ground lamb meat with a spoon or your hands. Form into six patties and set aside.

Put sliced onion into a mason jar or a glass measuring cup. Bring the pickling mixture to a simmer in a sauce pan on the stovetop at a low medium heat, stirring gently. Only simmer as long as necessary to dissolve the sugar. Pour the hot mixture over the sliced onion, being sure to cover onion slices completely. Cover and let sit for thirty minutes. This should be enough time to make this quick pickle. Make the tzatziki while the red onion is pickling.

Use a small, clear glass bowl, or any other attractive bowl you have. Combine until ingredients are consistent. Prepare an attractive serving spoon.

Have these ingredients at the ready to make sliders once the patties are cooked. For an attractive display, take ingredients out of packaging and use attractive bowls and/or dishes.

Grill the lamb patties on a griddle or in a pan. They are prone to fall apart on a gas grill. Have the condiments, including the pickled red onions, displayed and ready for guests to form sliders to their liking. Diners can put butter lettuce on the rolls, then a lamb patty, then layer with tzatziki, crumbled feta cheese and pickled red onions. Enjoy!