Prepare all ingredients and have them ready.
Place the chicken breasts at the bottom of the crockpot.
Sprinkle salt, pepper, oregano, and paprika over the chicken.
Add chopped onions and minced garlic on top.
Pour in the diced tomatoes and chicken broth.
Cover the crockpot with the lid securely.
Set the temperature to low and cook for 4-6 hours.
Check the chicken for doneness; it should reach 165°F (75°C).
Once cooked, shred the chicken in the pot using two forks.
Mix everything together before serving.