Pat the chicken breasts dry with paper towels and season both sides with smoked paprika, thyme, salt, and pepper.
In a large skillet over medium-high heat, add the olive oil. Once hot, add the chicken breasts and sear for about 5-6 minutes on each side until golden brown. Remove the chicken from the skillet and set aside.
In the same skillet, add the sliced onions and cook, stirring frequently, for about 10 minutes until they are tender and caramelized. Add the minced garlic and cook for an additional 1-2 minutes until fragrant.
Pour in the chicken broth and scrape the bottom of the skillet to deglaze, releasing all the flavorful bits. Bring to a gentle simmer, then stir in the heavy cream. Let the sauce cook for another 3-4 minutes until it thickens slightly.
Lower the heat and return the chicken to the skillet. Spoon the onion and cream mixture over the chicken breasts, cover, and let it cook for about 15-20 minutes, ensuring the chicken is cooked through.
Once the chicken is fully cooked, taste the sauce and adjust seasoning, if necessary. Serve the smothered chicken on a plate with generous amounts of the onion sauce, and sprinkle chopped parsley on top for color.
Notes
Serve over mashed potatoes or rice for a complete meal.