Heat a large, non-stick skillet over medium heat.
Meanwhile, pat your salmon fillets with a paper towel to dry and season each side with salt and pepper.
Add avocado/olive oil to hot pan. Once your oil is hot, add the salmon portions and sear for ~3-4 minutes per side. Remove the salmon from the skillet and set aside.
In the same pan, add the diced onion and garlic and sauté until tender, ~2 minutes.
Pour in the Rao’s Arrabbiata sauce, fish sauce, Penzey’s Pizza seasoning (or your favorite Italian seasoning), and chopped spinach. Stir to combine and reduce heat to low. Let simmer until ingredients fully incorporated, ~2 minutes.
Stir in the grated parmesan and nestle the salmon portions back into the sauce mixture. Cook until the salmon is cooked through, ~2-3 minutes.
Top with crushed red pepper flakes, freshly ground black pepper, and chopped basil and you’re ready to dish up. Enjoy!