Whole Mackerel with Rutabaga Mash and Parsley-Grape Salad - Andrew Zimmern

Ingredients

• 1 whole cleaned mackerel, about 3 pounds
• 2 cloves garlic, sliced
• 1 onion, diced
• Juice of 1 lemon
• 1 tablespoon olive oil
• 1 tablespoon chopped fresh rosemary
• Brown butter and fried capers, for serving (recipe below)
• Parsley-Grape salad, for serving (recipe below)
• Rutabaga mash, for serving (recipe below)
• 1 stick salted butter
• Juice of 1/2 lemon
• 1 tablespoon thyme leaves
• 1/4 cup olive oil
• 1/4 cup neutral oil
• 1/2 cup capers, dried well