01 - Combine olive oil, lemon juice, minced garlic, cumin, smoked paprika, oregano, salt, and black pepper in a large bowl. Add chicken cubes and toss thoroughly to coat. Allow to marinate for at least 20 minutes, or refrigerate for up to 2 hours for deeper flavor penetration.
02 - While chicken marinates, blend chickpeas, tahini, lemon juice, olive oil, garlic, cumin, and salt in a food processor until completely smooth. Gradually add water, one tablespoon at a time, until achieving a creamy, spreadable consistency. Taste and adjust seasoning as necessary.
03 - Preheat grill or grill pan to medium-high heat. Thread marinated chicken pieces evenly onto skewers, leaving slight space between pieces for proper heat circulation.
04 - Place skewers on the preheated grill and cook for 12 to 15 minutes, turning every 3 to 4 minutes to ensure even cooking. The chicken is done when fully cooked through with an internal temperature of 165°F and shows light char marks.
05 - Spread prepared hummus generously across a serving platter. Arrange grilled chicken skewers on top of the hummus bed. Garnish with chopped fresh parsley and serve immediately with lemon wedges, warm pita bread, and fresh vegetable accompaniments if desired.