Place the breadcrumbs in a large bowl, add the vegetable broth and mix well.
Add the Poblano pepper, salt, black pepper, cumin, garlic powder and onion powder. Mix to combine.
Add the ground turkey and use your hands to combine the mixture. Divide into 4 portions and form patties. Place on a plate or baking sheet. Cover with plastic wrap and refrigerate for at least 30 minutes.
To cook the burgers: Spray a skillet with oil and place over high heat. Add the burgers to the pan and reduce the heat to medium-high. Cook on one side until browned, then flip. Flip over a few times to prevent burning and to make sure the burgers are cooked all the way through.
If you are grilling the burgers, spray with oil to prevent sticking. Cook the burgers on medium heat, about 5 to 7 minutes on each side, or until no longer pink in the center.
Assemble the burgers on hamburger buns with lettuce, tomato and avocado.