Creating Authentic Shish Tawook is simple when you follow these steps:

1. Prepare Chicken: Cut the chicken thighs into medium-sized cubes.
2. Make Marinade: In a large mixing bowl, combine minced garlic, lemon juice, yogurt, olive oil, cumin, paprika, allspice, coriander, salt, and black pepper. Mix well.
3. Marinate Chicken: Add the chicken cubes to the marinade. Ensure all pieces are well-coated. Cover and refrigerate for at least 1 hour, or overnight for more flavor.
4. Soak Skewers: If using wooden skewers, soak them in water for about 30 minutes to prevent burning during grilling.
5. Skewer Chicken: Thread the marinated chicken onto the skewers. Alternate with pieces of bell peppers or onions, if desired.
6. Preheat Grill: Heat your grill to medium-high heat, or prepare a grill pan on the stovetop.
7. Grill Skewers: Place the chicken skewers on the grill and cook for about 15-20 minutes, turning occasionally, until the chicken is golden brown and cooked through (internal temperature should reach 165°F).
8. Rest Chicken: Remove skewers from the grill and let the chicken rest for a few minutes. This helps retain its juices.
9. Garnish: Sprinkle chopped parsley on top for an added burst of color and flavor.

Following these simple steps will lead you towards making delicious, Authentic Shish Tawook that is sure to impress.