Use a certified vegan tortellini — most store-bought tortellini contains egg or cheese, so check the label if you want to keep this soup fully plant-based. Leftovers keep in the fridge for up to 3 days, but the tortellini softens as it sits; if you plan to make it ahead, cook the pasta separately and add it to each bowl when serving. Serve with crusty bread and a drizzle of olive oil.