A variation from the other replies to this. Try chopping a few handfuls of leaves (and flowers if you like), not too fine, and wilt them in a bit of butter. Then add the lot to a pan of boiled new potatoes.

You can also use them like spinach eg wilt and chop fine, mix with ricotta, and use it to stuff pasta.

Or wrap fish in it and bake in the oven.

(We can do all these, because there's about 200 acres of it outside the back door!)