Heat the oil in a large skillet over moderate heat and cook the sliced garlic and chili flakes, stirring frequently, until the garlic is dark brown, about 10 minutes.
15 cloves garlic, 1 tsp chili flakes, 1/4 cup Extra Virgin olive oil
Be careful not to cook the garlic until it begins to turn black.
Add the tomatoes, salt, and pepper and simmer uncovered until the sauce is fairly thick, about 10 minutes.
15 oz tomatoes, salt
Add the chicken thighs and cook covered, stirring occasionally, until the chicken is cooked, about 15 minutes.