Bell Pepper Substitutes:
If you don’t like bell peppers all that much, you can substitute them for onions and poblano peppers. These are very similar to bell peppers in that they provide many of the same body-cleansing properties, while also sporting that same crunch you know and love.
If you are looking for more heat, try some jalapeno peppers or Anaheim chilies to give your dish a little bit of kick. But remember that you don’t want to add a flavor that’s going to overpower the salmon. The salmon should be the main focus of the dish, and that should be elevated instead of covered up.