Preheat oven to 200°F. Heat clarified butter and garlic in a large skillet over medium-high. Cook until sizzling fades, about 3 minutes. Add chicken pieces, and cook until lightly browned, 5 to 7 minutes; flip after 3 minutes. Sprinkle with salt and pepper.
STEP 2
Add vinegar and bring to a brisk boil; top chicken with tomatoes and parsley. Reduce heat to low; cover and cook until chicken is cooked through, about 15 minutes, flipping after 7 minutes. Transfer chicken to a baking dish, and keep warm in oven.
STEP 3
Skim and discard fat from surface of vinegar mixture in skillet. Cook over low until reduced by one-third, 3 to 4 minutes. Remove garlic cloves; mash garlic pulp into sauce. Add salt to taste; whisk in 2 tablespoons butter until creamy.
STEP 4
Transfer chicken to a platter; pour sauce over chicken, and serve immediately.