01 - Season both sides of each chicken breast with salt pepper and garlic powder rubbing the spices evenly into the meat.
02 - Heat olive oil and butter in a large skillet over medium-high heat. Add chicken breasts and sear for 4-5 minutes per side until golden brown and nearly cooked through. Remove chicken and set aside on a plate.
03 - Reduce heat to medium. Add chopped shallot and garlic to the same skillet. Sauté for 2-3 minutes until softened and fragrant.
04 - Pour in chicken broth scraping up any browned bits from the bottom of the skillet. Simmer for 2 minutes to reduce slightly.
05 - Stir in heavy cream Dijon mustard and chopped dill. Bring to a gentle simmer stirring constantly to combine flavors.
06 - Return chicken breasts and any accumulated juices to the skillet. Simmer on low heat for 6-8 minutes until chicken is cooked through and sauce has thickened.
07 - Stir in lemon juice and adjust seasoning with additional salt and pepper if needed. Garnish with extra fresh dill and serve hot.