BAh, screw the mustard just learn to cook chicken. We eat alot around our house anyway, spice it up.
Here is a little way to make it taste good. We use boneless chicken breasts (we buy the bags at Wally World, Aldi, etc.).
First thaw out the breast, put it in a zip-lock bag and leave a corner open, now get a skillet or maul and beat the crap out of it until it has a fairly uniform thickness (not too thin).
Put a skillet on the stove over medium heat and coat the bottom of the pan with olive oil.
Season your chicken heavily. This is what I use most of the time. Salt (easy on that), Black Pepper, Garlic powder, and then plenty of Cumin. Or for more of a BBQ flavor I substitute a seasoning that is available here at Wal-Mart called Strawberries for the Cumin, its made here in SE Mo so I don't know how available it will be elsewhere, I have fond it in other cities though.
Now put it in the skillet and leave it alone till it has a crust on the bottom, should take 5 minutes or so adjust your heat accordingly, flip and repeat, you should only have to turn it once. Cook it till its done in the middle but don't over cook it that's what make it dry and crappy. LOL
Now shred it, chop it, cube it and put it over a salad, make a wrap, sandwich (light bread of course) :roll:, and enjoy.
PS If nothing else you can order Strawberries online (its gooood stuff if you BBQ much).
https://www.strawsbbq.com/index.html