Preheat the oven to 450 degrees
Next, make the gremolata by roughly chopping everything together in a small food processor.
Then add 1 Tbsp. extra virgin olive oil to a baking dish and coat the bottom. Add in all the vegetables, drizzle the additional olive oil on top and the oregano, sea salt and pepper. Bake for 20 minutes.
Prepare the cod while the vegetables bake. Pat dry and then add the olive oil, salt, pepper, red pepper flakes, oregano and lemon juice.
When the vegetables are done, lower the oven temperature to 410 degrees. Remove them, mix them and then move them to the sides and layer in lemon slices.
Layer the cod filets on top of the lemon slices. Bake for 12-15 minutes.
Serve immediately with the gremolata sauce on top of the cod filets and then add extra sea salt and fresh cracked pepper to taste.