In a large Dutch Oven heat 1 TBS cooking oil over medium high heat. Add in diced onion, carrots, celery, and bell pepper. Cook for 5 minutes to partially soften down the vegetabes.
Add in ground beef. Break it up and brown until no longer pink. Drain excess grease.
Stir in garlic for 1 minute. Add in beef broth, diced tomatoes, rotel tomatoes, Italian seasoning, garlic powder, onion powder, salt, & black pepper. Stir and bring toa boil.
Add in drained green beans, drained corn, and pasta shells. Stir well to combine. Taste to adjust any seasonings. Let simmer on a boil (high heat) until the pasta is cooked through and tender. Enjoy.