Preheat oven to 400 degrees F.
Place the sweet potatoes on a lightly greased baking tray. Rub with oil for a crispy skin. Bake for 55-65 minutes or until a fork can easily be inserted into the flesh of the potatoes.
Place walnut into a food processor and pulse until they look like crumbles, set aside.
Into a large skillet add olive oil and all the spices (ancho chili powder - all spice). Turn the heat to medium and cook stirring constantly, until mixture is bubbling and fragrant.
Turn the heat off heat and carefully add sugar, garlic and vinegar the stir together. (mixture will bubble). Add walnuts to the skillet. Using a spatula, mix until spice mixture is evenly incorporated into the walnuts. Return skillet to medium heat, add 3 tablespoon of veggie broth or water and cook for about 5 - 10 minutes allowing water to soak up and walnuts to soften. Add pine nuts and cook for an additional few minutes to toast the nuts.
Make the sauce by combining tahini, lemon juice and garlic clove in a small bowl, mix well. Sauce will be thick and could be made thin by mixing in 2-3 tbsps of hot water.
Assemble your sweet potato…blah blah blah