Cooking Louisiana  -  Scorching Tomato Sauce
Scorching tomato sauce is an old method to add flavor and reduce acidity in tomato dishes. Illustrated below are a few of the fundamentals for scorching tomato sauce.

Here is the start, cooking the moisture out on a medium fire.

Cooking Tomato Sauce

Here most of the moisture is gone.

Cooking Tomato Sauce

This is what the sauce looks like when it's scorching. Notice how the edges look like they're curled. The sauce actually begins to slightly fry. Burning will occur if left unattended, stir it often and turn the fire to med-low. The sauce will darken a little as it is scorched, compare the previous picture and the one below. This takes as much time as the amount of sauce you're dealing with. Like a roux, if you burn it, it's trash.

Scorching Tomato Sauce