This is a “throw it in the oven” type meal, which is perfect for when it is cold (so probably not such a good choice now it is getting warmer.
Take a large pot (one which you can put on a gas burner and in the oven), put some olive oil. Add some diced onion, soften. Then add some vegetables and ensure that it is coated with the oil.
Add some chicken stock.
Add a chicken.
Place in the oven for about two hours or until the chicken is cooked.
The chicken will be lovely and tender.