Creating this delectable dish is simple if you follow these steps:

1. Prep Slow Cooker: Lightly grease the slow cooker with olive oil to prevent sticking.
2. Layer Ingredients: Place the chicken breasts at the bottom of the slow cooker.
3. Add Vegetables: Sprinkle the diced onion and minced garlic over the chicken.
4. Add Tomatoes: Pour in the diced tomatoes, including the liquid.
5. Mix Cream and Broth: In a separate bowl, combine the heavy cream and chicken broth. Stir in Italian seasoning, salt, and black pepper.
6. Combine Mixture: Pour the cream mixture over the chicken and tomatoes in the slow cooker.
7. Cook: Cover the slow cooker and cook on low for 4-6 hours or on high for 2-3 hours, until the chicken is fully cooked and tender.
8. Shred Chicken: About 30 minutes before serving, shred the chicken using two forks and stir it back into the sauce.
9. Add Basil: Stir in the chopped fresh basil just before serving for a burst of flavor.
10. Serve: Serve the creamy tomato basil chicken over pasta or rice, and sprinkle with grated Parmesan cheese if desired.

These straightforward steps will guide you in creating a meal that’s not only delicious but also a joy to prepare.