Steps
1. Preheat the oven to 400°F (200°C).
2. Chop the red bell pepper, onion, and zucchini (if using) into chunks.
3. Toss the veggies with olive oil, salt, and pepper, then spread on a baking sheet. Roast for 20 minutes until soft and slightly caramelized.
4. While the veggies roast, season the chicken pieces with salt and pepper. Cook them in a skillet over medium heat until fully cooked and golden, about 6-8 minutes.
5. In the last 2 minutes of cooking the chicken, sprinkle shredded cheddar cheese over the pieces and cover the skillet to melt the cheese.
6. Meanwhile, mix Turkish yogurt with minced garlic and ground coriander. Set aside.
7. Once the veggies are roasted, transfer them to a blender or food processor and blend into a thick sauce. Adjust seasoning as needed.
8. Slice the sandwich bun. Spread the roasted veggie sauce on the bottom half.
9. Layer the cheesy chicken pieces on top of the sauce.
10. Dollop the coriander-garlic yogurt mixture on the top half of the bun.
11. Assemble the sandwich and serve immediately.