Preheat the oven to 375°F (190°C).
Prepare the filling by mixing ricotta, Parmesan, parsley, thyme, garlic powder, salt, and pepper in a bowl.
Butterfly each chicken breast for stuffing.
Stuff each chicken breast with the ricotta mixture and secure with toothpicks.
Heat olive oil in an oven-safe skillet over medium heat.
Sear the stuffed chicken rolls for 3-4 minutes on each side until golden brown.
Add marinara sauce to the skillet around the chicken rolls.
Transfer the skillet to the preheated oven and bake for 25-30 minutes.
Let the chicken rolls rest before slicing.
Serve with additional marinara sauce if desired.