Prepare the Chicken: Begin by rubbing each chicken breast with olive oil. Generously season both sides with sea salt, black pepper, and Italian seasoning to infuse flavor.
Sauté Aromatics: In a medium-sized skillet, heat over medium flame. Add the finely diced onion and minced garlic, sautéing until the onions become translucent and soft, about 3-4 minutes.
Combine in Slow Cooker: Place the seasoned chicken breasts in the bottom of your slow cooker, arranging them in a single layer for even cooking. Pour the crushed tomatoes over the chicken and add the sautéed onion and garlic mixture. Stir in the chopped basil, saving a handful of basil leaves for garnishing after cooking.
Cooking Time: Cover the slow cooker with a lid and cook on low for 6-8 hours or on high for 3-4 hours.
Shred the Chicken: Approximately 30 minutes before you’re ready to serve, use two forks to shred the chicken directly in the slow cooker. Stir well to evenly coat the shredded chicken with the rich tomato sauce.
Add Cheese: Sprinkle the shredded mozzarella cheese generously over the chicken mixture. Cover the slow cooker again and allow the cheese to melt for the last 15 minutes of cooking.
Serve: Plate the luscious chicken mixture over your choice of cooked pasta or rice for a comforting meal. Garnish with the reserved fresh basil leaves.
Notes
For an enticing presentation, serve in deep bowls, twirling the pasta or rice with a fork for an elegant look.