large chicken breast (If you're using raw chicken, slice it into thin strips. If it's cooked chicken breast, coarsely shred it) • medium onion, sliced in strips • bell peppers, sliced in strips • can of no-salt crushed tomatoes (either the tomatoes or taco seasoning can have salt, but probably not both, or it's too salty) • taco seasoning • a pound to a full pound of dried spaghetti