Cut two ¾ to 1-inch steaks from the center of the head. Use the remaining cauliflower to create the cauliflower puree.
Preheat the oven to 350 degrees. Heat a large cast iron skillet over medium heat for 8-10 minutes. Add a drop of vegetable oil to the pan and spread over bottom of the pan with a paper towel.
Lightly coat each cauliflower steak with olive oil and generously sprinkle steak seasoning.
Cook each side of the steak for 4 minutes or until browned. Place in the 350 degree oven for 10-15minutes or until the cauliflower is soft and cooked through.
If cooking more than 2 steaks, brown steaks two at a time. Place browned steaks on a baking sheet and then place all the steaks in the oven to cook for the remaining 10-15 minutes.
Serve over cauliflower puree with chimichurri on the side.
Chimichurri
In a mini food processor, finely chop the parsley, cilantro, garlic, shallot ,oregano, salt and pepper. Slowly add the olive oil, vinegar and lime juice. Continue processing until smooth.
Can be refrigerated for a couple weeks. If you like a thinner sauce, add more oil until you reach a consistency you like.
Cauliflower Puree
Cook cauliflower in a saucepan with vegetable broth seasoned with salt for 10 minutes or until soft. Strain cauliflower. Warm milk and butter in a microwave. In a food processor or blender, puree cauliflower. Slowly add warmed milk and butter. Continue blending until smooth.
Cauliflower puree can be made ahead and reheated before serving.
Plating the Cauliflower Steaks
Spread cauliflower puree on each plate. Top with chives. Place cauliflower steaks over puree. Add dabs of chimichurri around the plate and serve extra on the side.