Preheat the oven to 400F and get out a cast iron or oven safe skillet. Prepare your chimichurri before beginning to cook by simply cutting up and adding ingredients small, you can also add to a food processor and set aside until ready to serve.
Clean your halibut and dry it really well. Season well with sea salt and pepper. On your stove top heat oven safe skillet to medium/high heat. Add avocado oil and let it get hot. Once hot add your halibut flesh side down (skin facing up). Let cook for 5-6 minutes until the flesh becomes golden.
Once the fish is nice and seared, flip it onto its skin and place into the oven for 10 minutes or longer depending on the thickness, size of your fish. I generally cook mine for 10 minutes until I can take a fork in center and see it’s cooked through.
Remove from the oven, let sit for 5 minutes before topping with your dijon chimichurri sauce. Serve alongside your favorite veggies or grain and enjoy!