Peel and finely chop the garlic. Keep aside for a few minutes to let it develop allicin so you can get its full health benefits.
Add olive oil in a pot on medium high heat. When the oil is heated, add the chicken, mushrooms, frozen peas and chopped garlic. Season with salt (½ tsp) and pepper. Saute until the chicken changes its color (about 2 minutes).
Add the dried oregano, pasta, the remaining salt and chicken stock (or water). Mix everything well, then lower the heat and cover. Cook for about 12-15 minutes (the cooking time and quantity of liquid will vary according to the kind of pasta you are using).
After 5 minutes of cooking, uncover and give a quick mix. Add more stock or water if it looks too dry. Cover and let cook on low heat until the pasta is just a little undercooked (bite into a piece and it should still have a crunch, but not too hard).
Add the cream, mix well and cover. Cook until the pasta is fully cooked.
Garnish with parsley and serve hot.