From the Diabetic Cookbook; takes about 30 min of prep time and a little over an hour total. Can be made up to baking point 2 days ahead. Just cover and refrigerate.

Place sweet potatoes in a large saucepan and cover with water. Bring to a boil. Cover and cook over medium heat until tender, 10 to 15 minutes. Drain well and return to the pan. Mash with a potato masher. Measure out 3 cups. (Reserve any extra for another use.) Preheat oven to 350°F. Coat an 8-inch-square (or similar 2-quart) baking dish with cooking spray. Whisk eggs, oil and honey in a medium bowl. Add mashed sweet potato and mix well. Stir in milk, orange zest, vanilla and salt. Spread the mixture in the prepared baking dish. To prepare topping: Mix flour, brown sugar, orange juice concentrate, oil and butter in a small bowl. Blend with a fork or your fingertips until crumbly. Stir in pecans. Sprinkle over the casserole. Bake the casserole until heated through and the top is lightly browned, 35 to 45 minutes.