Creamy Chicken and Vegetable Soup

chicken breasts, (chopped into bitesize chunks)

carrots, (peeled and roughly chopped)

potatoes, (peeled and roughly chopped)

celery sticks, (sliced)

mushrooms (sliced)

salt and pepper

dried thyme

chicken stock

butter

large onion, (peeled and finely chopped)

plain (all purpose) flour

semi-skimmed milk

lemon juice

sliced kale

chopped parsley