Preheat the oven to 400°F and line 2 baking sheets with parchment paper.
Add the tomatoes, bell peppers and potatoes to a large mixing bowl. Add 1 tbsp of the olive oil, the thyme, parsley, salt, red pepper flakes and the garlic. Mix well and spread out onto the baking sheet.
In the middle of the baking sheet, move some of the vegetables out of the way and place the block feta cheese. Drizzle the feta with some olive oil. Bake for 40 minutes, flipping the vegetables halfway through. The feta will brown around the edges slightly.
While the vegetables and feta bake, prepare the chicken. Mix the spices together and rub on either side of the chicken pieces.
Heat a large frying pan over medium heat. Once hot, add a drizzle of olive oil to coat the pan and place both pieces of chicken. Sear for 3-4 minutes per side until golden brown. Place the chicken on the other lined baking sheet.
Place the chicken in the oven and bake for 15-20 minutes until cooked through (internal temp reaches 165°F). Tip: Have everything ready at the same time by placing the chicken in the oven while the vegetables have 20 minutes left on the timer.
Break down the block of feta with a fork, mix with the vegetables if desired and enjoy!