In a large nonstick skillet, saute onions and garlic in oil for 2-3 minutes.
Add the pork chops; brown on both sides and sprinkle with salt and pepper.
Remove chops and onions with a slotted spoon; keep warm.
Add water to drippings; bring to a boil, scraping any browned bits from pan. Return chops and onions to pan; add the tomatoes. Bring to a boil. Reduce heat cover and simmer for 25-30 minutes or until meat is tender.
Stir in corn and zucchini; cover and simmer for 10-15 minutes longer or until the vegetable are tender.