Vegan Doner Kebab

Ingredients

• 14 1/8 oz seitan
• 1 Tbsp vegetable oil
• 2 tsp chicken spice mix
• ⅓ cup unsweetened soy yogurt
• 1 Tbsp tahini
• 1 garlic clove
• ¼ tsp salt
• ½ cup vegan mayonnaise
• 2 Tbsp fresh mint leaves
• 2 Tbsp fresh dill
• 1 tsp fresh lemon juice
• 1 tsp agave syrup
• 2 Tbsp ketchup
• 1 Tbsp harissa paste
• 1 tsp pomegranate molasses
• 1 Turkish pide bread
• ¼ head iceberg lettuce
• 1 medium tomato
• ¼ cucumber
• ¼ small red onion
• 4 pickled pepperoncini peppers