In a large pot, heat the olive oil and onion over medium-high heat until the onion is cooked through and translucent, about 5 minutes.
Add garlic and cook until fragrant, about 30 seconds.
Add the broth, tomato sauce, diced tomatoes (with the juice), green beans, peas and carrots, corn, parsley, basil, and salt.
Continue to heat until the mixture is boiling. Add the alphabet noodles and simmer for 10 minutes. Stir frequently. Remove the pot from the heat and allow the soup to rest for 5 minutes. Add salt and pepper to taste, and enjoy right away.
Video
Notes
This soup is pretty thick, just the way I like it. If you'd like it less thick, add a second can of water or up to two more cups of broth, and adjust the seasoning to taste.
You can find the alphabet letters near other pasta or in the Hispanic foods section of the grocery store.