Heat the oven. Preheat the oven to 450°F. Line a baking sheet with aluminum foil or grease with cooking spray; set aside.

Prepare the salmon. Whisk together the chili powder, cumin, oregano, salt and black pepper together in a small bowl until combined. Lightly pat the salmon filets dry with paper towels. Then place them in a single layer on the baking sheet, brush on all sides with oil, and sprinkle evenly with the seasoning mixture. Bake until the internal temperature of the salmon reaches 135-145°F*, about 4-6 minutes per half inch of thickness (measured by the thickest part of the filet). You can also test for doneness by inserting a fork or knife in the salmon and twisting it a bit; the fish should be opaque and flake easily.

Make the salsa. While your salmon is cooking, toss together the oranges, avocado, red onion, jalapeño, cilantro and lime juice in a medium bowl until combined.

Assemble the tacos. Once the salmon is cooked, use a fork to roughly shred it into large pieces. Add the salmon to your tortillas, top with a few spoonfuls of salsa (plus some extra cilantro if you would like)…and enjoy!