To guide you through preparing these wonderful Middle Eastern Tofu Kebabs, follow these simple steps:

1. Prepare Tofu: Press the tofu for at least 30 minutes to remove excess moisture. Cut it into 1-inch cubes.
2. Make Marinade: In a bowl, mix together the olive oil, soy sauce, lemon juice, cumin, coriander, paprika, garlic powder, and onion powder.
3. Marinate Tofu: Add the tofu cubes to the marinade, ensuring they are well coated. Cover and refrigerate for at least 1 hour (or longer for enhanced flavor).
4. Prepare Vegetables: While the tofu marinates, cut the bell pepper and red onion into chunks. Set aside.
5. Soak Skewers: If using wooden skewers, soak them in water for about 30 minutes to prevent burning.
6. Preheat Grill: Preheat your grill to medium-high heat (about 400°F or 200°C).
7. Assemble Skewers: Thread the marinated tofu, bell pepper, and red onion onto the skewers, alternating between each component.
8. Season: Sprinkle salt and pepper over the assembled skewers.
9. Grill Kebabs: Place the skewers on the grill and cook for 15-20 minutes, turning occasionally, until the tofu is golden and the vegetables are tender.
10. Serve: Once cooked, carefully remove the kebabs from the grill. Serve hot with your favorite dipping sauces or sides.