Heat the oil in a large nonstick frying pan over moderate heat. Cook the onion and garlic for 5 minutes or until soft. Add the tomatoes, tomato pasta sauce, dried chilli and a pinch of salt. Simmer for 10 minutes.
Meanwhile, cook the tortellini in a large saucepan of boiling water according to the packet directions, until firm-tender. Drain and toss with the sauce.
Did you know?
The most nutritious pastas are made from semolina, a coarse flour ground from durum wheat. Durum is a hard grain that has a higher protein content than other types of wheat.