Sauteed in a little oil or bacon fat, I find the older leaves to be very tasty - too bitter for me to eat raw.
Last night we had sauteed mustard, chickory, purslane, dandelion, chives and garlic tossed into a pot of drained new boiled potatoes and bacon bits.
Bashed the potatoes just a tiny bit, salt and pepper and olive oil. That is what I do with my bitter greens.
If there are any left overs then will put them in a
skillet in the morning and break a few eggs over the top, cover it and let it cook till eggs are firm. But there are no leftovers this morning