Creating Slow Cooker French Wine and Mustard Chicken is simple. Follow these steps to prepare this incredible dish:

1. Prepare Ingredients: Gather all ingredients and measure them out.
2. Sear Chicken: In a skillet, heat olive oil over medium-high heat. Sear the chicken thighs for about 3–4 minutes on each side until browned. This step enhances the flavor but is optional.
3. Add Aromatics: In the same skillet, add chopped onion and garlic. Sauté for 2–3 minutes until softened.
4. Mix Sauce: In a bowl, combine the red wine, Dijon mustard, chicken broth, thyme, rosemary, salt, and pepper. Whisk until smooth.
5. Layer in Slow Cooker: Place the seared chicken thighs at the bottom of the slow cooker. Pour the sautéed onions and garlic over the chicken, followed by the sauce mixture.
6. Cook: Cover the slow cooker and cook on low for 6–8 hours or high for 4–5 hours. The chicken should be tender and easily pull apart with a fork.
7. Check Seasoning: About 30 minutes before serving, taste the sauce and adjust seasoning if needed.
8. Garnish: Once cooked, remove the chicken and let it rest for a few minutes. Stir in chopped parsley before serving.

These steps will guide you in creating this incredible dish effortlessly.