Heat oven to 425°.
Line a baking sheet with foil or parchment paper, then spray it with a light coating of olive or avocado oil spray.
Pat the salmon filets dry with paper towels and place them on the prepared baking sheet. If the fillets have their skin on and you don't want it, leave the skin on for now. It's much easier to remove after the salmon is cooked.
In a small bowl, stir together the chili powder, cumin, oregano, coriander, garlic powder, onion powder salt, chipotle flakes/powder and cayenne powder. Then stir in the avocado oil or olive oil.
Evenly coat the salmon fillets with the spice paste.
Bake the salmon for 8-10 minutes (if using a probe thermometer, insert it into the thickest fillet now), until the internal temperature reaches 145°. Remove the salmon from the oven and let cool.
Meanwhile, prep your veggies and toppings: shred cabbage, chop cilantro, etc.
In a medium bowl, stir or whisk together the mayonnaise and salsa. Taste and add more mayo or salsa, depending on your preference, if desired.
Evenly distribute the veggies to each bowl. Add one fillet per bowl (peeling away the skin, if desired). Drizzle or spoon over the sauce and dig in!