Grilled Tex-Mex Fish Tacos
You can use any mild white fish--tilapia, cod, sole, etc. You may also substitute shrimp.
You can use 1 finely chopped chipotle pepper in adobo sauce instead of 1 teaspoon chipotle chile powder. For the spread, you can use 1/2 teaspoon chipotle powder instead of chipotle peppers in adobo.
You can use light sour cream instead of plain yogurt, and flour tortillas instead of corn, if preferred.