1.Preheat oven to 180°C. Grease six 1½-cup (375ml) ovenproof dishes.
2.Cook pasta in large saucepan of boiling water until tender, drain.
3.Meanwhile, melt butter in medium saucepan, add flour, cook, stirring, 1 minute. Gradually stir in milk, cook, stirring, until sauce boils and thickens. Combine sauce, tuna, peas, shallot, parsley, rind, juice and pasta in large bowl.
4.Spoon mixture evenly into dishes, sprinkle with combined cheese and breadcrumbs, dollop with extra butter. Bake about 30 minutes or until browned lightly. Stand 5 minutes before serving.