Preheat oven to 375 add a metal pan to the oven as its heating
Rinse chicken and pat dry
Mix syrup and mustard together and then brush on chicken breasts
Carefully remove hot pan from oven and add the four breasts - put back in oven for about 20 minutes
Remove and drain off any liquid
Add squash, scatter around the chicken and bake for 10 minutes
Remove pan and add the remaining veggies - if pan is getting brown burn spots pour a little white wine into the pan, just enough to cover the bottom. Drink the rest while you are waiting;-)
Put pan back into the oven until done about another 15 or 20 minutes.
When everything is nice and roasted remove and serve.