Start by cutting your chicken thighs into bite-sized pieces, dicing the potatoes, slicing the carrots, chopping the onion, and mincing the garlic. Having everything prepped makes the cooking process much smoother.
In a skillet over medium heat, add 2 tablespoons of olive oil. Once heated, add the chopped onion and minced garlic. Sauté for about 3-4 minutes, or until the onion is translucent and fragrant.
Transfer the sautéed onion and garlic to your slow cooker. Add the chicken thighs, carrots, potatoes, and frozen peas. Pour in 4 cups of chicken broth, and add the dried thyme, dried rosemary, salt, and pepper. Stir gently to combine all the ingredients.
Cover the slow cooker and cook on low for 6-8 hours or on high for 3-4 hours.
About 30 minutes before serving, stir in 1 cup of heavy cream. If you want a thicker stew, mix 2 tablespoons of cornstarch with a bit of water to create a slurry before adding it to the stew.
Once the cooking time is up, taste and adjust seasoning as necessary. Ladle into bowls, garnish with chopped fresh parsley, and enjoy your Slow Cooker Creamy Chicken Stew with crusty bread or over rice!