Put into blender milk, eggs, milk powder, salt, yeast, onion and dill and blend until smooth.
Arrange 6 slices of bread close together in bottom of shallow, oiled baking pan.
Top with cheese.
Close sandwiches with remaining bread.
Pour milk mixture over sandwiches.
Bake at 350Â° F. for about 20 minutes, putting under broiler during the last few minutes to brown.
Cut into 6 portions.