Wash the chicken portions, dry them, apply salt and pepper.
Heat the oil and brown the chicken.
Add the onions. Continue browning for 3′-4′.
Pour the tomatoes and a little bit of warm water and simmer for 1 hour and 15 ‘.
At the end of boiling, add cinnamon, rosemary, the bay leaf, salt and pepper. Leave the herbs for the last 10 minutes to flavor the sauce. Remove them afterwards.
Boil the spaghetti and drain them.
Pour some melted butter into them. Mix well.
Serve the spaghetti with the chicken pieces on top.
Sprinkle with Mizithra cheese or grated Kefalotyri cheese.