In a large pot over medium heat, saute the onion in the olive oil or a splash of water until soft and slightly translucent.
1 Tablespoon extra virgin olive oil, ½ cup onions
Add the carrots, celery, and garlic, and saute for a few more minutes until softened.
½ cup carrots, ½ cup celery, 3 cloves garlic
Add the vegetable broth, tomatoes with the juice, and Italian seasoning. Once it has come to a boil, add the kidney beans, green beans, and macaroni. Allow to simmer, stirring occasionally, until the pasta is cooked al dente.
4 cups vegetable broth, 1-14.5 ounce can diced tomatoes, 1 Tablespoon Italian seasoning, 1-15 ounce can kidney beans, 1 cup fresh green beans, ¾ cup elbow macaroni
Taste and add salt and pepper, as needed, and serve.
salt and pepper
Notes
Leftover soup can be refrigerated in an airtight container for 3 to 4 days, or frozen for up to 3 months. The cooked pasta will absorb the broth, so you may need to add a little water before reheating it seems too thick.