This tastes like apple crumble but is built like a proper breakfast. Grating half the apple into the batter keeps it moist without extra sugar, and the egg sets it into soft, sliceable squares. Make it the night before and reheat it in the morning.

A serving with the yogurt has about 20g of protein and 7g of fibre, which is what makes it a breakfast rather than a pudding. The protein comes from the egg, milk and yogurt; the fibre from the oats, apple and walnuts.
Oats are one of the few foods with an approved health claim in the UK. Their soluble fibre, beta-glucan, lowers LDL cholesterol when you eat about 3g a day. This dish gives you part of that, and it slows how quickly the carbohydrate reaches your blood, which is why it is tagged for blood sugar.
The sweetness is mostly fruit. Grated apple and cinnamon do the work that sugar does in most baked oat recipes, so there are only two teaspoons of maple syrup in the whole dish, about 3g of added sugar per serving. Many baked oat recipes online use five or six times that.
For women around menopause, a breakfast that combines protein and fibre keeps energy steadier through the morning: see the best diet for menopause. For a no-bake version you can make in two minutes, try the overnight oats with flaxseed.