Preheat oven to 375°F (190°C)
Mix paprika, garlic powder, onion powder, thyme, oregano, black pepper, salt, brown sugar, and cayenne in a bowl
Pat chicken dry, coat in olive oil, then generously apply seasoning
Heat a pan on medium-high, add oil, and sear chicken for 3 minutes per side until golden
Move pan to oven and bake 14-15 minutes until chicken reaches 160°F internally
Remove chicken and let rest for 7 minutes, then slice and drizzle with lemon juice
In the same pan, melt butter and add garlic, sundried tomatoes, red pepper flakes, and Italian seasoning
Cook for a few minutes, then pour in chicken stock, half and half, and Parmesan
Cook until sauce thickens and stir in optional oregano and chili flake
Season sauce with salt, pepper, lemon zest, and juice
Serve chicken over mashed potatoes and top with sauce
