# Prepare the filling at first. Put vegetable oil into a pot and make it hot. Then add diced 
onion on it.
# When the 
onion pieces turn into yellow, add chopped 
spinach in it and sauté the mixture over high heat until the 
spinach pieces loose their freshness.
# Add crushed 
walnut, salt, crushed red 
pepper, black 
pepper in it. Then break the egg into the mixture and sauté the mixture for a while and cover the lid of the pot.
# When cooling the mixture of 
spinach, prepare the outer side of the meatballs. Rest the bulgur in 1 + 1/2 cups warm water for 10 minutes.
# At the end of the resting time, add ground meat, cumin, salt, 
flour and 1 tbsp vegetable oil onto the bulgur. Wet your hands and knead the mixture for 10 minutes.
# Grease heat resistant small bowls with too much oil. Pick 
lemon sized pieces from the mixture of bulgur. Shape them as patties between your palms, then fill them into the bowls firmly by giving the shape of the bowl to the mixture.
# Put the mixture of 
spinach into the bowl also. Get a plate shaped mixture of bulgur and cover the filling with it.
# Repeat the same processes, until finishing all the mixture. Place the bowls into cold oven and cook them with 383 F for about 30-35 minutes.
# After removing the bowls from the oven, reverse them over the service plates.