Step 1: Prepare the Ingredients. Start by slicing your carrots, celery, and onion. Cube the potato and mince the garlic. Make sure your chicken is ready to go.
Step 2: Sauté the Vegetables. In a medium skillet, heat the oil over medium heat. Add the sliced onions and cook until translucent, about 5 minutes. Stir in minced garlic and cook for an additional minute.
Step 3: Combine Ingredients in the Slow Cooker. Add the sautéed onions and garlic, followed by the sliced carrots, cubed potato, and sliced celery. Nestle the chicken on top.
Step 4: Add the Seasonings. Sprinkle flour, black pepper, sage, and salt over the chicken and vegetables. Pour in the chicken broth.
Step 5: Cook. Cover the slow cooker and set it to low for 6-8 hours or high for 4 hours.
Step 6: Add the Peas. In the last 30 minutes of cooking, add the frozen peas.
Step 7: Serve. Once done, shred the chicken or serve whole. Enjoy your hearty stew!