It all happened very quickly. My friend Jimmy IMed me and asked what we were up to, we said nada, decided to all go to a movie but first, I invited him over for dinner. “It won’t be fancy,” I warned. “Probably just some pasta.” (I had penne in the cabinet and cauliflower in the refrigerator, so I knew I could make this recipe, minus the broccoli.) But after the plan was set, my hosting gene kicked in and I felt the need to also make a dessert and an appetizer. The dessert? I’ll tell you about that later. But the appetizer came together in no time, and it had everything to do with having three ingredients on hand: spicy mustard, a box of Triscuits and a can of sardines.