Spagetti bolognese

This recipe is from cookbook called Perfect Pasta. It is easy to make and delicious. I didn't follow exact recipe as usual. I didn't use mushroom, bacon, chicken liver and heavy cream. Here is the recipe with my changes.
Ingredients

1 tbsp olive oil
1 small onion chopped
2 carrot, finely chopped
2 celery stalk finely chopped
1 lb ground turkey
2 tbsp tomato paste
1/2 cup white wine
salt and pepper
1/2 tsp freshly grated nutmeg
1 cup chicken stock
1/2 package spaghetti cooked according
to  package direction
2 tbsp chopped fresh parsley to garnish
freshly grated parmesan cheese
Preparation Method
Heat the olive oil in a large pan over medium heat. Add the onion carrot, celery to the pan,then cook until soft. Add the ground turkey cook until the ground turkey is evenly cooked.
Stir tomato paste and cook 2 minutes. pour in the wine and season with slat, pepper and the nutmeg. Add the stock.Bring to a boil, then cover and let simmer gently over low heat for 30 minutes.
Spoon the sauce over the cooked paste, garnish with parsley and serve with parmesan cheese.