2.Heat oil in large saucepan, add onion, garlic and turkey; cook, stirring, until browned. Stir in sauce and oregano; simmer, uncovered, about 10 minutes or until thickened, season to taste.
3.Combine ricotta and parmesan in small bowl.
4.Spread ½ cup turkey sauce over base of ovenproof dish (2-litre/8-cup). Top with one lasagne sheet, trimmed to fit. Top with one-third turkey mixture. Spread with one-third of the mozzarella. Repeat layering, finishing with lasagne; spread with pesto then ricotta mixture.
5.Bake, in oven, about 45 minutes or until pasta is tender. Stand 10 minutes before serving.
We used a thin tomato pasta sauce, also known as sugo or passata, which contains only tomatoes and onion.