Add the sliced Italian sausage to the bottom of the slow cooker.
Pour in the drained white beans, frozen mixed vegetables, and diced tomatoes.
Add the chicken broth, Italian seasoning, garlic powder, salt, and black pepper.
Stir everything together until the seasoning is evenly distributed.
Cover and cook on low for 6 to 8 hours.
Stir once more before serving to check the seasoning.