Ceviche with tomatillos

1 pound fresh Pacific halibut or other firm-fleshed fish 1 teaspoon kosher salt 3 tablespoons fresh lime juice 2 ripe avocados, peeled and pitted 3/4 cup[...]

3 pounds mahi mahi, cut into 1/2-inch cubes Kosher salt 1/2 cup freshly squeezed lime juice 1 pound tomatillos, husked, rinsed, and cut into small dice 24[...]