I've always made another ceviche recipe with squid that is really tasty, but it takes so much forethought. I came across this in Mark Bittman's book The Best Recipes of the World, and it looked easy and quick, always a nice combo. But it was also delicious, which makes it a real keeper in my book.
1 lb scallops (or any white fish)
1/2 cup finely chopped bell pepper
1/4 cup lime juice (1-2 limes)
salt to taste
cayenne pepper to taste
garnish w/ cilantro
Mix everything together except the cilantro and sit at room temperature for 15 minutes or more. Toss with cilantro and serve.
Yield: 4 servings (as an appetizer)
Source: Mark Bittman's The Best Recipes in the World