Grilled Asian Tuna Over Spinach

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   ["Soak bamboo skewers in cold water for 30 minutes. Mix together marinade ingredients in medium sized bowl. Set aside. Cut tuna steaks into bite-sized pieces (about 3/4"" dice) and thread onto skewers. Place in shallow dish and pour marinade over tuna skewers. Cover and chill 1 hour. (Skewers can be marinated for up to 1 day.)", "", "Preheat oven to 425 degrees. Toss diced sweet potato with oil and season with salt and pepper. Place in a small baking dish (single layer) and bake until potatoes are fork tender and crispy (approximately 20 minutes).", "", "Meanwhile, ignite grill and set on medium-high heat. Prepare vegetables and dressing. Julienne roasted red pepper; then cut strips in half lengthwise. Slice the green onions thin on the bias. Combine the ranch dressing, milk and mustard; set aside.", "", "Sprinkle tuna skewers with sesame seeds and place right on grill rack. Cook about 3 minutes on each side or until done. Let sit for 5 mintues. Remove tuna from skewers.", "", "Assemble the Salad:", "Toss spinach with dressing. Divide onto 4 plates. Sprinkle each salad with roasted red peppers, green onions and sweet potatoes. Top each salad with grilled tuna (about 2 skewers each). Enjoy!"]

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