Pat the chicken thighs dry with paper towels, then season both sides with salt and black pepper. Place a skillet over medium-high heat and add olive oil. When the oil is shimmering, add the chicken thighs skin-side down and cook until golden brown, about 5-7 minutes. Use tongs to flip and cook the other side for another 4-5 minutes, then remove the chicken and set aside.
4 pieces bone-in chicken thighs
Add sliced garlic to the same skillet and sauté until fragrant, about 1 minute. Then pour in the ripe tomato juice, scraping up any browned bits from the bottom of the pan. Bring the mixture to a gentle simmer and cook until slightly thickened, about 3-4 minutes. Return the chicken to the skillet, nestling it into the sauce.
4 pieces bone-in chicken thighs
Reduce heat to medium and spoon slices of mozzarella over the chicken and sauce. Cover the skillet with a lid or foil and cook until the cheese has melted and begun to turn slightly golden, about 5 minutes. The sauce should be bubbling gently, and cheese should be gooey and soft.
4 pieces bone-in chicken thighs
Remove the lid and allow the cheese to develop a slight crust if desired, cooking for an additional 2 minutes. Taste and adjust seasoning with more salt or pepper if needed. Serve hot, garnished with fresh herbs if desired.