Season the fish with salt and pepper on both sides.
Mix the flour with the paprika and oregano in a bowl and use it to cover the fish in a light layer.
Melt the butter along with the olive oil in a pan over medium heat. The olive oil keeps the butter from burning ;)
Once melted add the fish and let it cook approximately 2 minutes. Turn them over and let them cook for another 2 minutes. It should still feel tender, not tough.
Remove the fish from the pan and lay them on a dish with kitchen paper.
Add the wine to the pan as well as the lemon and let the sauce reduce until it thickens. Add salt and pepper.
Toast the sunflower seeds on a pan over medium heat. Remove them.
Now preheat the same pan to high heat and add the butter. Immediately add the spinach (throughly washed and dried) and salt . The salt should go into the pan with the spinach as it helps to keep it bright green.
Stir the spinach on the pan until wilted and remove. Mix about half the seeds into the spinach.
Place the spinach at the center of the dish and then the fish on top of them. Finish with the sauce, sunflower seeds and a few chili flakes if desired.