Combine the spices (paprika, garlic powder, thyme, oregano, black pepper, salt, and cayenne) in a bowl.
Season the chicken thoroughly with the spice mixture.
Heat olive oil in a pan, then sear the chicken on one side until browned. Flip the chicken and transfer the pan to a preheated oven. Roast for 10 minutes until the chicken is cooked through.
Remove the chicken from the pan and set aside to rest.
Add garlic, sun-dried tomatoes, chicken stock, chilli flakes, oregano, and cream in the same pan. Stir well, bring to a simmer, and cook until the sauce thickens.
Add the grated parmesan and stir until melted and combined.
Serve the chicken with mashed potatoes and the pan sauce.