Pat the chicken dry. Season all over with 1½ teaspoons of the salt
Heat 1 tablespoon of the oil in a large skillet over medium. Once the oil is glistening, add the chicken and cook about 3 minutes per side, or until golden brown. Transfer the chicken to a plate.
Add the oil and shallots/onions to the same skillet and braise, stirring, until tender, about 4 minutes. Add Garvin's Infused Vinegar until fragrant, about 30 seconds. Stir in the heavy cream, chicken stock, 2 tablespoons fresh tarragon, mustard, lemon zest, and remaining ¼ teaspoon salt.
Return the chicken to the skillet along with any collected juices on the plate. Bring the sauce to a simmer over high heat, then reduce the heat to medium low. Simmer until the internal temperature of the chicken reaches 100 Degrees Celcius, and simmer for 15 minutes