Cut the chicken into small bites. Peel the potatoes and cut them into cubes. Heat oil in a pan and fry the chicken. Remove it, and in the same pan, fry the chopped onion and the cleaned and sliced mushrooms.
Combine the chicken in tray with the onions and mushrooms, add the crushed garlic, chopped olives and potatoes, and mix them with the blanched and chopped spinach.
Flavor with spices. Add 1 cup of chicken broth and put the dish to bake for about 20 minutes in a moderate oven or until the potatoes are ready.
Remove, sprinkle it with grated cheese and return it to the oven to roast.