I made a no-bake passion fruit tart which needs only a few ingredients. The crust was made of sugar-free musli and dried dates which are definitely more delicious and healthier than digestive biscuits. If you have other cereals at home, you can do some experiments using the same method to make different types of tart crusts. They usually go well with simple fillings such as greek yogurt and custard. Oh yes, that can be a great breakfast idea! Try it guys.