Whisk together lemon juice, olive oil, Oh My Spice! seasoning, and dried parsley. Pour over chicken in a resealable container and flip chicken until all surfaces are coated with the marinade. Refrigerate at least 1 hour, but preferably overnight.
Add all tabouleh ingredients to a bowl and mix until well combined. Set aside in the refrigerator.
Remove chicken from refrigerator and grill or pan sear over medium-high heat for 3-5 minutes per side until cooked through (cook time will vary based on thickness and grill/stove settings). Allow to rest for 5 minutes before slicing.
Divide chicken, tabouleh, hummus, and kalamata olives between 6 serving dishes.