Preheat oven to 400 degrees and line a large baking sheet with foil.
Combine seasonings in a small bowl and set aside: garlic powder, onion powder, chili powder, cumin, paprika, ground red cayenne pepper, Mexican oregano.
Lay the chicken tenders out on the baking sheet, then fill in the empty spaces between the tenders with peppers and onions.
Sprinkle the seasoning blend evenly over the chicken and veggies.
Squeeze the juice from half a lime over the chicken and veggies, then sprinkle with salt and pepper.
Bake for 12 to 15 minutes, or until chicken is cooked through.
Slice chicken and serve over peppers and onions with warm flour tortillas and additional toppings (Homemade Guacamole, shredded cheese, hot sauce).