I found chicken one sheet dinners on Cooking Classy and have made innumerous variations depending on what vegetables I have on hand.
I prefer to cook the potatoes separately, to have the option of using just chicken and vegetables in other meals (such as tossed with pasta and pesto) so technically it becomes a 2-dish dinner.
• Skip the potatoes
• Skip to tomatoes
• Use cauliflower instead of broccoli or both
• Use Brussels sprouts instead of broccoli, quartered
• Add 1 cup of green beans cut up
• Add fresh herbs after cooking, about 1/2 chopped basil, parsley or cilantro. Or 1/4 cup finely chopped rosemary
Check out Cooking Classy for many other Chicken and Veggie One Sheet Dinners.