Bread – What the gluten look like when kneading for long time on a texture basis

I know of four reasons to let your unyeasted dough sit for a while:

1. Gluten relaxation. user9074 has already explained this. The gluten that has formed during kneading needs time to relax, which will make the dough easier to work with and cause the cooked bread to be more tender.

2. Gluten formation. Kneading isn't the only way to get gluten molecules to link up. Time works well too. There are "no knead" bread recipes where you just mix the dough and then let it sit in a cool spot overnight, or in the fridge for a day or two. A few hours sitting on the shelf may improve your dough by letting more gluten molecules connect.

3. Autolysis. The flour itself contains enzymes that will break down some of the starch and proteins in the flour and improve its flavor. The effect of autolysis will be greatest if your dough doesn't include salt, but it may be a factor even with salt added.

4. Hydration. It takes time for the flour to really absorb the water that you add. If you've ever made a pie crust you'll know that pie dough changes dramatically during the rest period. It becomes soft, smooth, and pliable. That transformation happens because the rest period gives the flour time to soak up the water. I expect that giving your dough time to hydrate will improve it as well.

These are just some reasons why resting could improve your end result. Ultimately, there's an easy way to answer your question. Make up a batch of dough and give it time to sit. Prepare another batch just before cooking. Cook up some parathas from both batches and compare. I bet you'll find a noticeable difference.

All that said, I'd also bet that unrested parathas are better than no parathas at all. Don't let short time prevent you from making them any way you know how. If you're into experimenting, there are ingredients such as dough relaxers that you could add to get some of the same benefits that you get from a long rest, but in a shorter time.

I baked 3 or 4 loaves of challah last January over a month period to try and perfect a rainbow loaf of bread for a dinner party (Wizard of Oz and over the rainbow themed).

Loaf 1 I mixed ingrediants and worked the dough and then prior to kneading I used cake decorating gelled (Wilton brand) coloring. This required substantial kneading to fully integrate the coloring and probably caused the loaf to not rise properly from over work or inconsistent gluten formation.

Subsequent loaves required making the water and yeast mixture and dripping in 5-35 drops of liquid food coloring into measured amounts of liquid by weight. Each liquid amount depending on rainbow location varied and the apparent strength of the drops did too. The liquid mixture then had a consistent bright color and adding in the sugar, salt and flour proved to make for a consistent color shading throughout. The minimal quantity of the alcohol/glycol based coloring didn't appear to affect the texture and the need to over work the dough was lessened since the color was consistent from the beginning.

Using up to 7 different colors in 1 large loaf (both rainbow shaped in a large baked bowl and in a braided roll) did require a bit more effort than making 1 batch of dough and separating briefly after kneading to add color. However the effort was well worth it!