Preheat countertop or backyard grill (I used a countertop George Foreman and it worked great). Sprinkle chicken chunks generously with grilling spice on both sides.
Drop pearl onions into hot water and allow to sit for a few minutes to soften the skin. Slice off top and bottom, and remove skins. Slice thinly.
Place chicken chunks and onion slices onto grill, and allow to cook for approximately 5 minutes. If you have a small counter top grill, you will need to run about 3 batches.
Slice in half at the thickest part to check for doneness.
Serve with a tossed salad, or go Mediterranean with some toasted pita and hummus.