CHICKEN PASTEL CHICKEN CASSEROLE BAKED IN A CRUST

Chicken Pastel Ingredients:
1 whole chicken, about 1 kg (2 lb), cut into bite-sized pieces
Juice of 4 calamansi
60ml (1/4 cup) soy sauce
2 tbsp olive oil
2 chorizo sausages, sliced on the diagonal about 1 cm (1/2 in) thick
50g (1/4 cup) butter
1 medium onion, diced
3-4 cloves garlic, peeled and diced