Heat 1 tablespoon of olive oil in a saucepan. Add 2 carrots, chopped, and 1 large onion, finely chopped. Cook for 5 minutes.
Add 1 liter of vegetable stock and 400g of canned chopped tomatoes. Simmer for 5 minutes.
Add 200g of frozen mixed peas and green beans. Simmer for another 5 minutes, until the vegetables are tender.
Add 250g of fresh spinach-and-ricotta tortellini. Simmer for the package cooking time, about 2 minutes, until cooked through. Season with salt and pepper.