Preheat the oven to 450°F (230°C). Slice the bell peppers and chicken thighs into small strips. You can use kitchen sheers to easily slice the chicken. Place them on a large baking sheet.
5-6 boneless skinless chicken thighs, about 1.25 pounds*, 2 bell peppers
Pour the dressing over the chicken and peppers. Add a pinch of kosher salt and pepper. Toss well to coat evenly. Spread everything into an even layer.
3/4 high quality Greek or Italian dressing
Bake for 8-10 minutes. Then, turn the broiler to high and broil for 3-4 minutes until the chicken and peppers get a little char. Keep an eye on them.
While the chicken cooks, slice the pitas in half. Cover them with a wet paper towel and microwave for 30 seconds or until warmed through. Gently open to create a pocket.
3-4 pitas
Crumble the feta cheese with a fork in a small bowl.
1 8-ounce block feta cheese
When the chicken is done, toss it again with clean tongs. Assemble the pita pockets with the chicken, peppers, crumbled feta, and tzatziki.
1 12-ounce container tzatziki*