Chili ready tomatoes come pre-spiced with a combination of salt, garlic, chili pepper, onion powder, dehydrated celery, and also dehydrated green peppers. If you opt for plain diced tomatoes, then add about ½ a teaspoon of any of those spices you may have on hand. Don’t sweat exact measurements. There’s plenty of other flavors in this recipe! Just don’t go overboard on the amount you add.