We used a preseasoned chicken breast from the store (lemon herb by Foster Farms). The chicken was tender and flavorful. The sauce was weird so we are going to thicken it up next time and possibly add some white wine.
I don't love shells but my SIL made these and I are them until I was sick - so good! Easy Cheesy Stuffed Shells are a delicious main deal that looks amazing. Serve with a garden salad for a complete meal!