1-In a large bowl, mix flour and semolina.
-Add powdered milk, yeast, baking powder, sesame and nigella seeds, spices (all dried ingredients) and mix well.
2-In the food processor, or in another large bowl, mix eggs, liquid milk, oil and sugar until well blended and dissolved.
3-Add the wet ingredients to the dry ones, mix well until the flour absorbs all the liquid.
-Melt butter and add it to the dough, kneed it until you get a good dough consistency.
-Cover and leave to rest for 6 hours.
4-Shape the dough into small balls or rings, brush with milk and sprinkle with sesame seeds if desired.
-Bake in a 395F preheated oven for about 15 minutes or until slightly golden.