Cereal-based snacks consisting primarily of cereals and grains and containing in whole or in part mixtures of nuts, almonds, seeds, peanuts, dried fruits, dried vegetables, cheese, dried meat, cereals, protein powders and dry or semi-dry supplements and containing no added sugar and no artificial sweetener; muesli-based snack bars; grain based snack bars; gluten-free cereal-based snack foods and bars