Heat oil in a large saucepan or Dutch oven over medium heat. Add pepper-onion mix, garlic, and crushed red pepper (if using) and cook, stirring, for 1 minute. Add tomatoes, broth, water, and basil (or marjoram); bring to a rolling boil over high heat. Add ravioli and cook for 3 minutes less than the package directions. Add zucchini; return to a boil. Cook until the zucchini is crisp-tender, about 3 minutes. Season with pepper.
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