Preheat the oven to 400°F. In a bowl, toss the quartered potatoes with 1 tablespoon olive oil, half the minced garlic, half the thyme, rosemary, and oregano, plus salt and pepper. Spread them on a baking sheet and roast for 25 to 30 minutes until golden and crisp.
While the potatoes roast, season the chicken thighs with the remaining garlic, thyme, rosemary, oregano, lemon zest, salt, and pepper.
Place the seasoned chicken in the slow cooker. Pour in the chicken broth and lemon juice.
Cover and cook on low for 6 hours or on high for 3 to 4 hours until the chicken is tender and cooked through.
Serve the chicken thighs alongside the roasted potatoes. Sprinkle everything with chopped fresh parsley before eating.