Potato Crusted Tilapia ... 4 ingredients! During Lent, I am always looking for easy, after school dinners to satisfy our fish-on-Friday requirements. This recipe is SO easy. Ridiculously easy. Chances are good that you even have most of these ingredients on hand to make this dinner tonight... For Potato Crusted Tilapia, you only need 4 ingredients - including the fish (any thin white fish