Set aside corn, chard, zucchini and basil. Add everything else to Instant Pot. Lock the lid and set to high pressure for 20 minutes. When done, carefully release steam.
Stir in zucchini and corn. Close lid, lock and set to high pressure for 5 minutes. When done, carefully release steam.
Stir in chard. Close lid, lock and set to high pressure for 2 minutes. When done, carefully release steam.
Divide soup into bowls and garnish with additional fresh basil. Enjoy!
Alternate cooking without an Instant Pot: Add olive oil to a large stockpot over medium heat. Stir in garlic, celery, and carrots. Saute vegetables until tender, about 5 minutes. Stir in vegetable broth, diced tomatoes, salt, pepper, oregano, onion powder, and garlic powder. Bring to a boil and reduce heat to a simmer. Stir in uncooked pasta and zucchini. Cook for 10 minutes. Stir in corn kernels and chard and cook an additional 3 to 5 minutes, or until greens are tender. Divide soup into bowls and garnish with fresh basil. Enjoy!