Cook the chicken. Heat 1 Tbsp oil in a Dutch oven over medium heat. Add the cubed chicken thighs, season to taste, and cook until cooked through. Remove the chicken from the pot and set aside.
Sauté the vegetables. Add the remaining 2 Tbsp oil to the Dutch oven. Add the chopped onion, sliced carrots, and celery, and sauté until the vegetables begin to soften. Add the minced garlic and cook until fragrant, about 1 minute.
Cook the split peas. Add the chicken broth, bay leaves, and split peas to the pot. Bring to a gentle simmer, then cook over medium-low heat for 35–40 minutes, or until the split peas are almost tender.
Potatoes. Add the cubed potatoes and cooked chicken to the pot. Continue cooking for 10–12 minutes, or until the potatoes are tender and the split peas are fully cooked.
Finishing touches. Taste and adjust the seasoning as needed, then stir in the fresh dill and parsley.
Serve. Serve and enjoy, friends!