In large stock pot brown ground beef. Drain any excess fat. Add onion and jalapeno. Over medium heat cook for 2-3 minutes. Lower head and add garlic and cook for additional minute. Add taco seasoning, salsa style tomatoes, chicken broth and rotini pasta. Cover and simmer for 15-20 minutes or until pasta is tender. Top with tomatoes, sour cream, cheddar cheese and if desired jalapeno slices.