Preheat oven to 400F. Line a baking sheet with parchment paper.

Place salmon pieces onto lined baking sheet, skin-side down.

Using a sharp knife, slice down the middle of each piece of salmon, lengthwise, but do not cut all the way through.

Brush salmon with 1 Tbsp of olive oil and season with salt and pepper. Set aside.

Heat remaining 1 Tbsp of olive oil in a large pan over medium heat.

Once hot, add spinach, Italian seasoning, paprika, cayenne, salt, and pepper. Sauté for a couple of minutes until wilted.

Turn off the heat, then add in chopped roasted red peppers, feta cheese, and parmesan. Stir to combine well, pressing down on the feta to soften it.

Spoon the spinach-feta mixture into the cut part of the salmon, being careful not to overstuff.

Place salmon in the oven and bake for about 12-17 minutes depending on desired doneness.

Remove from oven and serve hot.