Cholesterol Free, Trans Fat Free High in Dietary Fiber, Source of Protein. No Gluten Ingredients Muesli is a breakfast cereal that contains oats, nuts, and dried fruits. Compared to sugary breakfast cereals, muesli is a healthier option. Muesli is full of ingredients that can aid your digestion, help you feel fuller, and protect your heart. Muesli may be a great food to add to a healthy diet.Muesli is a nutritionally dense breakfast option.