Steps
1. Season the chicken thigh with salt and pepper.
2. Heat olive oil in a skillet over medium heat. Add chicken, skin side down, and cook until golden brown, about 5 minutes.
3. Flip the chicken and cook for 3 minutes more, then remove and set aside.
4. In the same skillet, add the sliced onions and a pinch of salt. Cook over medium-low heat until caramelized, about 10 minutes.
5. Add minced garlic and sauté for 30 seconds until fragrant.
6. Pour in the beer and chicken broth, scraping the bottom of the pan to loosen browned bits.
7. Return the chicken to the skillet, add thyme, cover, reduce heat, and simmer for 20 minutes until chicken is cooked through.
8. Meanwhile, warm the mashed potatoes with butter.
9. Serve the beer-braised chicken topped with caramelized onions and a side of garlic mashed potatoes.