A boneless stuffed turkey breast with savory filling is a high protein, family-friendly alternative to whole turkey. This elegant, easy-to-carve option is perfect for smaller holiday gatherings.
Preheat oven to 375°F. Lay turkey breast flat and gently pound to an even thickness, about 1 inch, with a meat mallet for easier rolling.
Heat 1 tbsp olive oil in a skillet over medium heat. Sauté onion for 2 minutes, then add mushrooms, garlic, and spinach; cook until vegetables are just tender and moisture evaporates, about 4–5 minutes.
Stir in parsley, thyme, bread crumbs, and salt. Remove skillet from heat, then mix in the beaten egg to bind the filling.
Spread filling evenly over turkey breast. Carefully roll up the turkey breast, starting from the short end, and secure it tightly with kitchen twine.
Brush outside of the roll with remaining olive oil. Sprinkle with pepper. Place in a roasting pan seam side down, cover loosely with foil, and bake for 50–60 minutes, removing foil after 40 minutes to allow browning. Internal temperature should reach 165°F.
Rest stuffed turkey breast for 10 minutes before slicing to preserve moisture and ensure easy carving.