Add oil to brown the chicken. Once chicken is brown, if not done, put in the oven at 350 until cooked through (about 10 minutes) Consider adding a small slushie to the sauce to thicken it up. And don’t reduce too much - you want a good amount of sauce
To lighten this up, instead of 4 tablespoons of butter, I used about a teaspoon and dotted on top of the fish. Still great flavor without swimming in butter