Select a large soup/stock pot. (I used an industrial stock pot.)
On medium-low to medium heat, add oil and butter to pot.
Cook onions until they turn gold, not brown. About 5 minutes.
About every 3 minutes, add the following and stir and repeat; carrots, celery, potatoes, zucchini, fresh green beans (if using frozen, wait until later), then chard.
Add crushed tomatoes, broth, Parmesan rind, and salt. Stir well. Cover pot with lid and cook for about 2 hours. Stir occasionally. The soup will stick if the heat is too high. Dilute with water or broth if soup seems too thick.
When soup is nearly finished, add beans (and frozen green beans).
Adjust seasoning, as needed. Salt and pepper.
Add cooked pasta just before serving. Serve with Pesto and grated parm.