Prep the chicken: Pat the chicken dry. Season both sides with salt, pepper, and a light sprinkle of Italian seasoning or oregano.
Heat the pan: Set a large skillet over medium-high heat. Add 1–2 tablespoons olive oil.
When it shimmers, it’s ready.
Sear the chicken: Add the chicken in a single layer. Don’t crowd the pan. Sear 4–6 minutes per side until golden and cooked through (internal temp 165°F/74°C).
If using thicker breasts, reduce heat to medium and cook a bit longer.
Add garlic and butter (optional): Reduce heat to medium-low. Add the minced garlic and butter to the pan. Stir for 30 seconds until fragrant, spooning some over the chicken.
Caprese topping: Top each piece with mozzarella and tomato slices.
Cover the pan for 1–2 minutes to melt the cheese slightly.
Finish with basil and glaze: Remove from heat. Add basil leaves on top. Drizzle generously with balsamic glaze.
Sprinkle a pinch of red pepper flakes if using.
Serve: Plate with extra glaze on the side. Great with a green salad, roasted asparagus, sautéed spinach, or garlic bread.