Marinate the chicken

• Whisk together the olive oil, tomato paste, lemon juice, garlic powder, onion powder, cumin, red chili powder, turmeric, salt and black pepper in a bowl.
• Add the chicken strips and coat well in the marinade.
• Let marinate for at least 30 minutes.

Cook the chicken

• Heat a little olive oil in a pan.
• Cook the marinated chicken over medium-high heat, stirring occasionally, until cooked through and lightly charred.

Make the garlic mayonnaise

• Mix the mayonnaise, minced garlic, chopped parsley, salt and lemon juice in a bowl until smooth.

Make the sumac onions

• Mix the sliced red onion, parsley, lemon juice and sumac in a bowl.
• Toss and set aside to soften slightly.

Fry the French fries

• Cook the French fries in hot oil until golden brown and crispy.
• Drain on paper towels.

Assemble the shawarma

• Warm the pita bread in a pan.
• Fill each pita with chicken, cucumber, tomatoes, pickled cucumbers, harissa sauce, garlic mayonnaise, sumac onions and French fries.
• Serve immediately.