The first time I made this lemon concoction, I called it “goop,” and still haven’t found a better name. My inspiration was an offbeat lemon jam I’d had in a Paris bistro. The jam, which I think was served with mackerel, was thick, velvety, salty, tangy, only a bit sweet and made with salt-cured preserved lemons. Haunted by the flavor and not patient enough to wait a month for lemons to cure, I cooked ordinary lemons, some with their peel, in a sugar-and-salt syrup, then blended them into a kind of marmalade, the goop. It’s excellent swiped over cooked fish, seafood, chicken or vegetables. The syrup, fragrant and full flavored, is terrific in marinades and great mixed with a little goop, sherry and cider vinegars, honey and oil to make a vinaigrette for beans, grains and hearty salads. I guess that goop is technically a condiment, but I call it a transformer. It’s that good.