Marinating fish in yogurt gives it a little bit of tang. The yogurt really prevents the fish from drying out, which is a common worry when making fish at home. There are great flavors from the seasonings, lemon, garlic, oregano, cumin, and a bit of allspice. Marinate the fish for up to an hour in the fridge if you have the time. If not, the whole thing comes together in 15 minutes if thats all the time you have. This recipe calls for perch, but you can use any tender, flaky, mild white fish (see note). Serve this with any greens, a greek salad, grilled vegetables, or an orzo salad.