First, using the same pot add olive oil, onions, salt and pepper on medium heat.
Next, add oregano, red pepper flakes, and garlic and stir for one minute.
Now add can of tomatoes and smash with potato masher (or big spoon). Then add the chicken broth, rosemary, and Parmesan rind.
Next cook 20 minutes uncovered.
Finally top with extra basil, Parmesan cheese and drizzle of olive oil and enjoy!