Put 1 pound boneless, skinless chicken breasts (cut into large cubes), the 15-ounce can diced tomatoes (with juices), 1 diced yellow onion, 3 minced garlic cloves, 1 tablespoon fresh minced ginger, 1 minced jalapeno pepper, 1/2 teaspoon turmeric, 1 teaspoon ground coriander, 1 teaspoon ground cumin, 3 teaspoons paprika, 3 teaspoons chili powder, 2 teaspoons garam masala, and 1/4 cup chicken broth or water into the slow cooker. Stir to combine evenly.