In a large pot, combine tomatoes, broth, basil, garlic, salt + pepper. Add in chicken.
Cover pot with lid and cook on medium heat for 20 minutes, stirring occasionally.
After 20 minutes, remove chicken and place on a cutting board. Pour coconut milk in the pot. Mix in milk and turn off heat.
Turn on immersion blender and blend up the soup until smooth.
Shred chicken. Add back to soup and stir.
Serve hot. Or store in glass containers (mason jars) for meal prep. Let cool before storing back in fridge or freezer.