Preheat oven to 190-degrees C or 375-degrees F.
In a stock pot, combine couscous and chicken stock. Simmer for 10-15 minutes.
1 ½ cups dry Israeli couscous, 2 cups chicken stock
In a saucepan over medium heat, combine oil, onion and bell pepper. Cook for 10 minutes.
3 tablespoon olive oil, 1 medium white onion, ½ yellow bell pepper
Add oyster mushrooms to the onion mixture and continue to cook for an additional 10-12 minutes.
250 g oyster mushrooms
Add in salt, tomato paste, spinach and tomato sauce to the onion mixture and stir together well.
pinch salt, 2 tablespoon tomato paste, 300 g 10 oz frozen spinach, thawed, dried, 1 ½ cups tomato sauce
Add the roasted chicken and cooked couscous, stirring together well, then transfer the mixture to a casserole dish.
200 g roasted chicken, chopped
Cover in the mozzarella cheese, then bake for 15 minutes. Serve topped with parsley.
1 ½ cups mozzarella, shredded, 1 tablespoon chopped parsley