Mix all the ingredients for the meatballs in a big bowl and roll mixture into large meatballs.
To Make the Soup
Heat oil in soup pot on medium high heat and sauté onion till it become soft and translucent. Add in garlic and sauté for a minute.
Add in carrots, celery and potatoes and combine well. Cook for 5 minutes
Add in tomatoes along with cumin and oregano and stir well. Add in vegetable broth and bring it to a boil. Reduce to medium heat and simmer uncovered for 15 minutes.
Slowly add in meatballs, being very cautious not to break them. Give a gentle stir. Cover and cook for 20 minutes.
Add in green beans and zucchini along with cilantro and cook for 8-10 minutes, till zucchini and green beans are cooked and meatballs have cooked all the way through.
Add in lime juice and adjust the seasoning to your liking.
Serve it with more lime and cilantro for garnishing.