My partner loves anything honey mustard so this is a popular dish.
You can certainly cook all your veggies on the stove and double or triple the amount of chicken and sauce. Just remember when doubling you will need to increase the time by 20%. Double the sauce will be plenty though.
If you want a subtle tasting sauce, reduce each mustard component by half.
You can serve the chicken and sauce over rice or pasta if desired.
Instructions for the stove top are below.