Heat 1Tbsp of oil in large skillet over medium heat.
Saute onion and garlic for 2-3 minutes.
In a bowl, mix 2T of flour with the mushrooms. Mix well. Add to skillet with onions and saute until mushrooms are slightly browned...about 4-5 minutes.Set aside. Combine remaining flour, salt, pepper and seasoning.
Heat ½ cup oil in another skillet over medium heat. Dredge chicken pieces in flour mixture and brown in heated oil. Drain on paper towels. NOTE: you are not cooking the chicken through, just browing each side. It will finish cooking in the next few steps.
In bowl, mix together Marsala or chicken broth with lemon juice, sugar, soy sauce, Worcestershire saude and red pepper flakes.
Add chicken into sauce. Turn up heat and stir until bubbles form. Turn down heat to medium-low and simmer for 12 minutes.
Stir in basil and parsley. Continue to simmer uncovered for another 10 minutes.
Serve over pasta or potatoes.