1. To make Candied Pecans: Preheat oven to 350°F. Line baking sheet with parchment paper, or coat with cooking spray. Spread pecans on prepared baking sheet, and toast 4 minutes.
2. Transfer pecans to large bowl, and stir in maple syrup and coconut oil. Stir in sugar until pecans are thoroughly coated. Return to baking sheet, and bake 3 to 5 minutes more, or until pecans look dry. Cool. Transfer to food processor, and pulse several times, or until pecans resemble chunky crumble. Transfer to small bowl, and set aside.
3. To make Sweet Potato Purée: Preheat oven to 400°F, and line baking sheet with parchment paper, or coat with cooking spray. Toss together sweet potatoes, maple syrup, and coconut oil in large bowl. Transfer sweet potatoes to prepared baking sheet, and roast 1 hour, stirring every 10 minutes, or until potatoes are fork-tender.
4. Purée sweet potatoes and coconut milk in food processor until creamy. Season with salt and pepper, if desired, and spread in 2-qt. casserole. Sprinkle Candied Pecans over top.