Prep the chicken: Pat chicken thighs dry.
Season generously with salt, pepper, paprika, and Italian seasoning. This helps the skin crisp and flavors the meat deeply.
Sear the chicken: Heat a large skillet over medium-high. Add olive oil (or sun-dried tomato oil).
Place chicken skin-side down and sear until deeply golden and crisp, about 6–8 minutes. Flip and sear the other side for 3–4 minutes. Transfer to a plate.
Leave 1–2 tablespoons of fat in the pan; pour off the rest if needed.
Sauté aromatics: Lower heat to medium. Add chopped shallot/onion and cook until soft, about 2–3 minutes. Stir in garlic for 30 seconds until fragrant.
Add tomato paste and cook 1 minute to caramelize slightly.
Deglaze and build the sauce: Pour in chicken broth and scrape up browned bits. Stir in sliced sun-dried tomatoes and a pinch of red pepper flakes. Simmer 2–3 minutes to reduce slightly.
Add cream and Parmesan: Stir in heavy cream and Parmesan until smooth.
Let it bubble gently for 2 minutes. Taste and adjust salt and pepper. The sauce should be lightly thick but still pourable.
Return chicken to the pan: Nestle thighs into the sauce, skin-side up.
Reduce heat to medium-low. Cover and simmer 10–15 minutes (boneless: 8–10 minutes) until chicken is cooked through. Internal temperature should reach 165°F (74°C).
Greens and finish: If using spinach or kale, stir it into the sauce and cook until wilted.
Add a squeeze of lemon for brightness if you like. Stir in butter for a glossy finish.
Serve: Sprinkle with chopped basil or parsley. Spoon the sauce over the chicken and plate with pasta, rice, mashed potatoes, or crusty bread.