M&S 6 Seeded Folded Flatbreads Six seeded folded flatbreads baked with mixed seeds for a light crunch and folded for filling. All of our breads are a natural source of Vitamin D and Fibre, two nutrients that are naturally low in our diets. We use a natural source of Vitamin D that is produced by yeast, which is why you will find ‘yeast’ on our list of ingredients, not because we use it as part of the dough making process.