I start with my 4.5" by 7" block. Then I trim it down from there to make it wonky, or I leave it alone and cut it wonky later. I attach 1" strips to the sides, some only on a few of the sides (see below.)
Then I trim them down to 5" by 7.5" with the white
Now I tried a different method on my fourth row, to see if it saved time and fabric. I added white to only three sides, thinking I would make one side larger to make up for both sides of the grout not being added. (So I did the top and bottom and right side of each block, making the right side wider than 1"). It did not save any time, it actually took up more time because I wasn't able to make them wonky the easy way, way too much fussy cutting. And the blocks were smaller than 7.5" making this row shorter than I anticipated.
So here is what I have done so far: