Preheat your oven to 400 degrees. Grease a 9x13 casserole dish, and butternut squash and poblano pepper. Lightly brush 1-2 tbsp avocado oil or olive oil over veggies. Sprinkle with salt. Bring to oven and bake for 25-30 minutes or until veggies are softened and lightly golden. Remove from oven.
Meanwhile, make the ground beef in a large saucepan. Heat to medium high heat, add a tbsp of oil. Cook the beef stirring frequently until no longer pink. Set aside.
While beef is cooking, make your enchilada sauce. Mix together arrowroot, chili powder, cumin, chipotle powder (if using), onion powder and salt. In a small saucepan, heat oil over medium high heat. Add garlic and saute 1-2 mins until fragrant. Turn heat down to medium low. Add spice mixture to the pan to form a paste. Now stir in broth, vinegar, and tomato paste. Heat to medium high and whisk while the sauce begins to thicken. Reduce heat once again, continuing to whisk for another 3-4 minutes. Set aside.
Remove vegetables from the oven. Top vegetables with beef and enchilada sauce and mix well. Return back to the oven, lowering to 375. Bake for 10 mins.
Now make the avocado cilantro sauce. Combine the ingredients into a food processor or blender. Blend until smooth.
Remove enchilada bake from the oven. Let cool for a few minutes. Top with avocado sauce, fresh cilantro, and any other desired toppings. Serve hot.