Prep the tzatziki sauce the night before (recipe linked above)
Preheat the oven to 250 degrees. Once preheated, wrap the naan bread in aluminum foil and place in the oven to warm
Put the chicken strips in a bowl and season with the olive oil, 1/2 of the dried basil, 1/2 of the oregano, zatar seasoning, and dried dill. Set aside
Slice both the bell peppers and the onion into long thin strips (pictured above) and set aside
Heat a skillet on medium high and add a drizzle of oil. Once your pan is hot, add the seasoned chicken and cook for around 3-5 minutes on each side or until done all the way through
Once all the chicken is done, remove and place on a clean plate.
Immediately add the peppers and onion to the hot skillet the chicken was just cooked in. Season with the remaining basil and oregano and salt and pepper to taste. Cook until desired tenderness, I like mine more crisp, so I don't cook them for longer than around 4-5 minutes. During the last 1 minute of cooking, add in a dash of fresh dill.
Remove the naan from the oven. Assemble the gyros by adding the tzatziki sauce, chicken, peppers and onion. Top with more fresh dill, tomatoes, and whatever else you desire- enjoy!