Okay. That bit about eating from the plate of God's cruelty and reverse engineering it so they could patent manna burgers had me thinking that it had to be satire, but I quickly scanned the site and it didn't appear to be a spoof. I should have given it a closer look.
Apparently, there really is such a thing as manna, an edible substance that appears in the desert. It is produced by insects. Here is one description, although I am sure that there are better ones:
from: link
'Manna' still occurs in the desert. Insects which live on the feathery tamarisk trees in the Sinai area suck the sap of the tree. Then they exude drops of a sweet, resinous secretion, varying in size from a pinhead to a pea. These stick on the ground and evaporate into white, frost-like particles before turning yellowish brown. They taste like solidified honey. Modern Bedouin gather the manna early in the day, before ants - possibly the 'maggots' of the Bible - become active and eat it. They seal it up in pots, away from the ants, kneading it later into a paste which is a nourishing addition to their everyday diet. "Depending on favorable conditions it is possible for one man to gather four pounds of manna in a morning. As early as the 15th century AD monks and Arabs in Sinai gathered manna soon after daybreak in order to sell it...Manna is not only a local product. The 'ambrosia' of the Greek gods was probably also the resinous secretion associated with the tamarisk - which grows widely in Mediterranean countries." - Marshall Cavendish, Genesis and Exodus