Parchment Packet Baked Tuna Steaks & Vegetables with Creamy Dijon-Turmeric Sauce

Preheat oven to 450 degrees F. Cut 4 large sheets of parchment paper, each about 16 by 12 inches (or use pre-cut parchment sheets).

Combine mayonnaise, parsley, mustard, honey and turmeric in a small bowl.

To make packets, lay the parchment sheets on a work surface with the long sides closest to you. Fold each in half (bringing the short sides together), then open. Place 1/2 cup potatoes on one side of each piece of parchment and sprinkle with 1/4 teaspoon salt and 1/8 teaspoon pepper. Top each with 1 cup of kale and a piece of tuna. Sprinkle the tuna with the remaining 1/4 teaspoon each salt and pepper. Brush with the mayonnaise mixture. Close the packets and seal the edges with small, tight folds. Place the packets on a large baking sheet.

Bake until the fish is just cooked through, 10 to 15 minutes. (Carefully open one packet to check for doneness--be cautious of the steam.) Set each packet on its own plate. Let stand for 3 minutes. Cut an X in the top of each packet with scissors and carefully fold open to serve.