In a bowl, combine the mustard, balsamic vinegar, garlic, rosemary, and lemon juice, and season to taste with salt and pepper.
1 tbsp. Dijon or homemade mustard, ¼ cup of balsamic vinegar, 2 tbsp. fresh rosemary, 1 garlic clove, Sea salt and freshly ground black pepper to taste, 2 tbsp. fresh lemon juice
Slowly pour the olive oil in with the mixture while whisking.
½ cup of olive oil
Place the chicken in a marinating container (glass or plastic don’t use metal) and pour the balsamic mustard marinade on top. Place in the refrigerator or leave on the counter, cover, and marinate for about 30 minutes.
8 boneless chicken thighs
Preheat your oven to 375 F.
Transfer the chicken to a baking dish and empty the remaining sauce on top.
Place in the oven and bake for 1 hour or until the chicken is cooked.
Serve with roasted vegetables.