Avgolemono soup is the Greek equivalent of chicken noodle soup, with a lovely lemon undertone.
For homemade chicken stock and to cook chicken from scratch: Use 4 cups/960ml water, around 1lb/450g chicken on the bone (thighs or drumsticks) and add in a chunk of carrot and onion. Bring to a simmer and simmer for approximately 45 minutes, skimming off foam as needed. Remove the chicken and vegetables and strain the stock. Clean out the pot to use for next step and add back the strained stock. Remove skin and shred the cooked chicken then discard the bones and vegetables. The rest is as above. You can also use orzo pasta instead of rice.