In a large saucepan, heat a tablespoon of olive oil over medium heat. Add the diced onions and minced garlic, and sauté them until they become fragrant and translucent.
1/2 cup diced onion, 2 cloves garlic
Add the diced chicken pieces to the saucepan and cook until they are browned on all sides.
4 cups cooked chicken, 1/4 cup of cold unsalted butter
Sprinkle the flour over the chicken and onions, stirring constantly to coat them evenly. Cook for another 2 minutes to cook off the raw flour taste.
Pour in the chicken broth and bring the mixture to a boil. Reduce the heat to low and simmer for 10 minutes, allowing the flavors to meld together.
1 cup chicken broth
Stir in the peas, carrots, thyme, and parsley. Simmer for an additional 5 minutes until the vegetables are tender.
1 cup frozen peas, 1 cup diced carrots, 1 teaspoon dried thyme, 1 cup diced celery
Meanwhile, preheat the oven to 200°C (180°C fan) and prepare the cobbler topping.
In a mixing bowl, combine the self-raising flour, baking powder, salt, and chopped parsley. Add the cubed butter and, using your fingers, rub it into the flour mixture until it resembles breadcrumbs.
1 teaspoon dried rosemary, 1/2 teaspoon salt, 1/4 teaspoon black pepper, 1 cup of self-rising flour, 1/4 cup all-purpose flour
Pour in the milk and stir until just combined. Be careful not to overmix; a few lumps are fine.
1 cup milk
Transfer the chicken and vegetable mixture into a baking dish. Spoon the cobbler topping evenly over the filling, leaving some gaps for steam to escape.
Bake in the preheated oven for 20-25 minutes or until the topping is golden brown and cooked through.
Remove from the oven and let it cool for a few minutes before serving.