Chop up the zucchini flesh and mushrooms. In a skillet add the tbsp of olive oil and heat. If you're using cooked shredded chicken, add zucchini flesh, mushrooms and chicken to the skillet together, otherwise add the chicken first and cook until no longer pink. To it add the chopped up zucchini flesh and mushrooms. Season with salt and pepper, cumin and oregano.
Cut the zucchini in half, lengthwise. Using a small spoon or a melon baller scoop out the flesh.