I have done several (4) and didn't like the bump in the middle so I went to the back and cut out 1.5" square and it lays so much better and I know Lizzie will like to quilt over it better now.
I don't know what a 10 minute block is. Your fabric choice is fab'. My imagination tells me this will be a great quilt if you go with it. I will do a search for the block.