Preheat your oven to 425°F and line a baking sheet with parchment paper.
Add all of the pumpkin ingredients to a mixing bowl and toss until the pumpkin is well coated. Spread pumpkin on the parchment-lined baking sheet and transfer to your preheated oven for 10 minutes, make sure to flip/stir the pumpkin pieces after the first 5 minutes. If the pumpkin isn't tender after 10 minutes, leave it in the oven until easily pierced with a fork.
In a separate mixing bowl, add 2 tablespoons of coconut sugar, 1/2 a teaspoon of cinnamon, and a pinch of sea salt. Set aside.
Heat a small, 8" skillet to medium heat. Add 2 tablespoons of the vegan butter. Once the butter is melted and hot, add a tortilla. After about 30 seconds, flip the tortilla and fold it in half. Fry each half for 10 to 20 seconds, until crispy. Add the tortilla to the bowl of cinnamon and sugar and toss until coated. Continue with remaining tortillas, stopping to add more butter to the skillet as needed.
Fill each tortilla with an eighth of the roasted pumpkin. Over the pumpkin filling, sprinkle pecans and drizzle with icing. Add one or two tacos to each plate for serving and, if desired, top with vanilla non-dairy ice cream and/or Whipped Coconut Cream.