Preheat your outdoor gas or charcoal grill. (I own a gas grill, and preheat on high.)

In a small bowl, combine all the spices and seasonings: garlic salt, oregano, paprika, garlic powder, onion powder and pepper. Stir to combine. Set spices aside.

In a medium mixing bowl, add the chicken pieces. Evenly sprinkle half of the spice mixture over the chicken. Stir to coat. Evenly sprinkle the other half of the spice mixture and stir again to evenly coat all the chicken pieces. Rinse and quarter the plums.

Using metal grilling skewers, add a piece of plum for every three pieces of chicken. I ended up with four large skewers.

Turn your grill to medium heat. **(If you're using non-stick grilling spray, see my directions below.) Place the skewers evenly on the hot grill. Grill for 10-12 minutes, turning half-way. (Grilling 5-6 minutes per side.) Let cool for just a few minutes before serving. Enjoy!

**The safest way to use non-stick grilling spray is to preheat as usual. When you're ready to add the meat, turn the grill/flame completely off. Adequately spray the grates, and then turn the grill back on. You'll still have a hot grill, and you won't risk being burned when spraying the grates.