Storage: Place miner's lettuce in a plastic bag (optionally with holes punched in it) and keep it in your refrigerator's crisper drawer.
Shelf Life: 3-7 days.

In salads, fresh miner’s lettuce can be tossed with cranberries, blue or
feta cheese, beets, citrus zest/juice, vinaigrettes or nuts (we
recommend pine nuts or sugared walnuts).
It can also be added to sandwiches or cooked as you would spinach –
sautéed, steamed, or creamed with freshly grated nutmeg.
How to Make a Vinaigrette
Miner's Lettuce Recipes