Looking at the picture, it looks a little watery, can I suggest you cook the base sauce down a bit more to evaporate the water from the initial input of 100 mls. Let it sweat off a bit more before adding more base, this will give the sauce more depth in flavour.
After 200mls of sauce and sweating down then add your chicken and cook for around 8-10 minutes if using raw chicken.
If using pre-cooked chicken then reduce your sauce to about 3/4 of what you desire before adding the pre-cooked chicken to just warm up.
You'll be impressed with the results
