The problem/great thing about fresh corn tortillas is when you buy a pound of them, they last all week (or so). They freeze well, but once thawed I inevitably wind up using them as many ways as possible before wrapping and returning the whittled-down stack to the freezer. Ceviche probably sounds like something you’d order in a restaurant, or on a beach in Mexico, but not something you’re likely to whip up at home. However. If I told you it required only chopping of seafood and marinating it in citrus, might you change your mind? There’s no need to turn on the oven or grill – the acidity of the lemon and lime juice alters the proteins in the seafood, cooking it without heat. You can actually see it change from not opaque to opaque – it’s very cool.