Avocado on toast with chilli on wholegrain toast is another winner for Rob Cereal drinks, like those made by Weetabix, may contain fibre and protein The "Healthy" Fruit You Need to Ditch From Your Breakfast | Byrdie UK. Breakfast: Eggs with avocado and salsa in a soft corn tortilla, or oatmeal mixed with berries and a small handful of a whole-grain, high-fiber cereal; The walnuts provide healthy fat; the fruit is a great source of fiber; the milk. Researchers hoped the results would reveal what breakfast eating habits would benefit those hoping to lose weight. Slim people of a healthy weight are more likely to eat fruit, dairy or cold cereal for breakfast than anything else, researchers have found. It is hoped the results.