For the bruschetta: Combine all ingredients and allow to rest.
For the garlic aioli: Combine all ingredients and allow to rest.
Season the salmon to your liking with garlic powder, cumin, salt and pepper.
Heat 1 tbsp oil in a cast iron pan over medium heat.
Place the salmon in the hot skillet and cook for 2-3 minutes.
Flip the salmon and allow to cook for another 5 minutes, or until it flakes with a fork.
For sandwiches: Spread 1/2 tbsp of aioli on both sides of the roll. Layer the onions, fish, bruschetta and lettuce on the roll.
If you don't want a sandwich, just have the fish with the bruschetta and aioli on top.