My idea

I was thinking that I'm not really wanting to dig out much more of my gravel patio to supply other projects until I get another truck load. While I was digging and transporting the dirt to the back yard I was thinking that I wish I could use some of the concrete chunks so abundant around the yard.
I got this visual image of using some pieces for a foundation under the bricks. The problem is filling in around the chunks. I thought what if I took some dirt and put it through the medium screen? Then take that dirt and mix it up in the pan with a little water until it is a good mud. And how about if I troweled that mud in to lay the concrete chunks like you would a rock patio?
There are a couple of sources for the concrete. There are two concrete strips on one side of the house about 70' long that used to be a drive way. The concrete is about 3" thick and the strips are about 18" wide.

So, I got a brick and an average piece of the concrete and photographed them with a tape measure. Here it is:

 So, the two together are around 8" thick, on average. So, I excavate about 9" to 10", or so, then lay the concrete "stones" using the mud and a trowel leaving the top below grade just a little more than the thickness of a brick. When I have the stones laid and filled in completely, I will put just one inch of fine material taken from the patio screenings that have been put through the fine screen to lay the brick exactly at the grade.
Then I back fill the whole bed with the top grade leveled by a screed board drawn over the edge of the sidewalk and the curb. I'm going to try and draw up something that makes sense of this scheme.