Incorporate the Cajun seasoning into the flour

Tenderize the chicken breasts and slice them in half

Heat olive oil in shallow sauce pan on medium high heat until hot but not smoking

Melt 1 tablespoon butter in the pan and add the chicken breasts

Brown chicken breasts on each side (about 3 minutes per side)

Remove chicken breasts from the pan and set aside

Add 1 tablespoon butter, onions, and garlic to the pan

Cook until onions start to become translucent (about 1 minute)

Add mushrooms and cook until they brown and lose much of their liquid

Pour in the Marsala wine and cook until wine is reduced by half

Add chicken stock and cook until the sauce has thicken slightly (about 3 minutes)

Lower heat to medium, add the last tablespoon of butter, and add the chicken breasts back to the pan

Cook chicken breasts for about 5 minutes, flipping occasionally

Season with salt and pepper