Healthy One Dish Meal - Spaghetti Bolognese

Ingredients:

100g spaghetti

100g minced chicken

50ml water

1 tablespoon olive oil

1/2 large onion

1 clove garlic

150ml pasta tomato paste

1 tablespoon chopped parsley

1/2 stalk stick celery

1 small tomato

5 pieces button mushrooms

200g potatoes