This is adapted from the Breakfast Bar recipe in Nigella Express, which interested me because it uses condensed milk to bind everything together, rather than fat. You warm the condensed milk in a pan and then stir in oats, shredded coconut, dried cranberries, peanuts, pumpkin seeds, sunflower seeds and sesame seeds.
I halved the recipe and instead of pressing the mixture into a baking pan to cook it, I used cake papers as I don't seem to have much luck making bars - they are either too hard or too crumbly.
Other changes I made were to use dried currants in place of some of the cranberries (because I didn't have enough for the recipe), and I used chopped cashews instead of the peanuts.
These were really tasty - I thought they were a bit sickly at first because of the sweetness of the milk and the coconut. But the next day when they were completely cool, the sweetness was less obvious. These are great for lunchboxes so I'll be making them again. It would also be very easy to adapt to whatever seeds/nuts/dried fruit you happened to have.