The interfacing is literally left on the block and the quilt is made as is.

Now, doesnt that sound easy?

You begin by sewing your strips onto the interfacing squares with fabric hanging over.

How To Make Scrappy String Quilt Blocks - Easy Quilt Idea -Jelly Roll Quilt Block

Image By: Lori Holt Via YouTube

Then, you will cut the block into a square while facing down to clean up the edges.

Learn To Make A Jelly Roll Quilt Block - Easy Quilt Idea - Quilt Block Pattern

Easy Quilt Idea - Farmhouse Decor - DIY Country Decor