This grilled chicken and strawberry Mason jar salad with poppyseed dressing, tasty and colorful, is assembled in wide-mouth jars for a take-along lunch, freshly made with marinated grilled chicken and homemade dressing. It can also be a time-saver in several ways. You can use purchased poppyseed salad dressing, and grill a little extra chicken the next time you pull out your grill, or use leftover rotisserie chicken.