spread the homemade sauce over two slices of bread, on one side.
assemble the sandwich- take the sauce-spread bread, keep 2 slices of cheese over the bread, followed by a layer of tomato and then onion. Next goes the slice of bread without any sauce, then place the fried egg over the slice, a layer of onion and then tomato. Place two slices of cheese over it and finish it with the last slice of bread (with sauce).
grill the sandwich, and make sure that the heat is enough to melt the cheese!