This is inspired by a Brasilian sweet dish called canjica, which is often served at the Festa Junina, the big winter festival. Canjica, a type of white corn, is cooked with coconut milk and sugar, sprinkled with spices and sometimes topped with crushed peanuts. Ours is a hot version made with oats, which are much easier to get hold of. It’s the perfect start to a cold day.