# Boil the orzo at first. Put grated 
onion into a small pot, add 2/3 cup water, 1 tbsp 
olive oil and 1/2 tsp salt on it. Add orzo on it also, cook the mixture over low heat, until the mixture soaks the liquid totally, by stirring it time to time.
# After cooling down the mixture of orzo, put it into a mixing bowl. Add ground meat, 
tomato paste, stale brad slices, black 
pepper, 1/2 tsp salt on it. Knead the mixture, until it smoothens totally.
# Refrigerate the mixture for 2 hours at least. At the end of the refrigerating time, pick 1 and half 
walnut sized pieces from the mixture. Roll them into balls.
# Place the prepared meatballs onto the greased baking tray. Put q lice of 
tomato over each of the meatballs. Place the tray into the oven, which is preheated to 374 F. Bake them, until the 
tomato pieces turn to red and lose their shape.
# Serve it hot.