Preheat and prep: Heat your oven to 400°F (200°C). Lightly grease a 9x13-inch baking dish. Pat the chicken dry and slice large breasts horizontally to create even, thinner pieces for faster, juicier baking.
Season the chicken: Sprinkle both sides with salt, pepper, and half the smoked paprika.
Rub in a drizzle of oil to help the seasoning stick.
Make the protein-packed sauce: In a bowl, stir together Greek yogurt, cottage cheese, Dijon, lemon zest, lemon juice, oregano, remaining paprika, and minced garlic. Taste and season with a pinch of salt and pepper. The mixture should be tangy and savory.
Layer the dish: Scatter chopped spinach across the bottom of the baking dish.
Lay the chicken on top in a single layer. Spoon the sauce over the chicken, spreading evenly so each piece is coated.
Add the cheese: Sprinkle mozzarella over the sauced chicken. Top with Parmesan for a salty, toasty finish.
Bake: Place on the middle rack and bake for 18–24 minutes, depending on thickness.
You’re aiming for an internal temperature of 165°F (74°C) in the thickest part. The cheese should be melted and bubbling around the edges.
Broil for color (optional): If you want deeper browning, switch to broil for 1–2 minutes. Watch closely to avoid burning.
Rest and garnish: Let the bake rest for 5 minutes.
Sprinkle with chopped parsley for a fresh finish.
Serve: Pair with steamed broccoli, roasted veggies, or a light salad. For carbs, serve over quinoa, brown rice, or whole-grain pasta.