For the ragu, heat the oil in a large flameproof casserole ... Add the bacon and fry for a further 1-2 minutes. Add the beef mince and fry for 2-3 minutes on each side, or until just browned.

Line an ovenproof rectangular dish of about 22 x 26cm/8½ x 10½in with a little of the ragù sauce, arrange sheets of lasagne over followed by ragù sauce, dots of mozzarella and white sauce and ...