Sharon Schamber has some Youtube videos where she demonstrates blocking blocks. Here are some links:
https://www.youtube.com/watch?v=v-3RIWhBvcA
https://www.youtube.com/watch?v=i6aplw_tVZc
https://www.youtube.com/watch?v=sQkF02vpVuw
She uses spray starch for the process.
You need just a moderate amount of quilting for the blocks to remain "blocked" in the quilt. Moderate quilting will secure the blocked squares to batting and backing, preventing them from reverting to wonky. You just wouldn't want to tie a quilt like this, or use Warm and Natural with quilting lines 10" apart.