Drain and rinse the butter beans and add them to a large salad bowl. Add salt, olive oil, zest, and lemon juice. Toss to coat.

Using a mandoline, slice the fennel very thin. Pile them in a salad bowl. Slice the beets as well. If the beets are larger, you may want to halve the rounds. Pile these in the same bowl. Rough chop the parsley and fennel fronds. Let sit until ready to serve.

When ready to serve, toss well. Garnish with a few extra fennel fronds on top.
