1. 1. Prepare the Chicken: Pat the chicken breasts dry with paper towels. Slice each chicken breast horizontally to create two thinner cutlets.

2. 2. Season the Chicken: In a small bowl, combine the olive oil, Italian seasoning, garlic powder, salt, and black pepper. Rub this mixture evenly over both sides of the chicken cutlets.

3. 3. Sear the Chicken: Heat a large non-stick skillet over medium-high heat. Add the seasoned chicken cutlets. Cook for 4-6 minutes per side, or until the chicken is golden brown and cooked through (internal temperature of 165 F (74 C)). Remove the chicken from the skillet and set aside on a plate, tented loosely with foil.

4. 4. Saute the Vegetables: In the same skillet, add the halved cherry tomatoes. Cook for 3-4 minutes, stirring occasionally, until they start to soften and burst slightly.

5. 5. Wilt the Spinach: Add the fresh spinach to the skillet with the tomatoes. Cook for 1-2 minutes, stirring constantly, until the spinach wilts down.

6. 6. Combine and Serve: Slice the cooked chicken breasts into strips or cubes. Return the sliced chicken to the skillet with the tomatoes and spinach. Toss gently to combine. Sprinkle the crumbled feta cheese over the top. If desired, garnish with fresh chopped parsley before serving.