Wheelbarrow by wheelbarrow.....

First you shovel a half of truck load of sand and gravel from a dry riverbed.
Then you mix cement, sand, water with the gravel you just shoveled from the riverbed.
Then you wheelbarrow the mixture to the oven....then you throw it up on top with your shovel...all wet and sloppy ....and HEAVY.
Then you repeat all of the above 8 more times........yep...that's what you do.

Ooops, I forgot about the wire and the tin foil.....heavy duty to reflect the heat back in the oven...Do you think the ancient Romans had tin foil?

And then you smooth it out and let it cure for 2 weeks...."When the moon hits the sky like a big pizza pie....that's amore."....Poor Steve...what he does for love!