Preheat oven to 375 degrees.
Add potatoes to a small pot and cover with water. Bring the potatoes to a boil for 7 minutes. Drain and add to a large bowl.
Add chicken breasts to the potatoes. Season with olive oil, dried thyme, salt and pepper. Toss to combine.
Preheat a large cast iron pan over medium high heat. Add 2 tbsp of butter and 1 tbsp of olive oil.
Once butter starts to sizzle add chicken breasts on one side of the pan and potatoes to the other.
Cook for 5 minutes per side until chicken is golden brown.
Place potatoes and chicken in a bowl and cover to keep warm.
Add butter and garlic to the same pan and cook for approximately 1 minute until fragrant.
Add remaining sauce ingredients and whisk to combine.
Nestle chicken and potatoes into the pan. Use a spoon to coat potatoes and chicken to ensure they don’t dry out.
Place pan in the oven. Bake for 15-20 minutes until chicken is cooked through and potatoes are tender.
Serve with garlicky green beans and loads of sauce!