I am going to try and provide a lot of educational information in addition to the actual methodology/recipe for making a great homemade red sauce. That's just my style. As you can probably already tell, I am a very wordy person and tend to over-explain. This comes from a lifetime of teaching and tutoring others. If you feel I am spending too much time on a simple thing, simply move on to the next step!
I will also put in a disclaimer; I do not have a quality camera, and in searching the web for images to use, I have come across many websites with similar methodologies to mine - no big surprise; how I do what I do is not exactly a super secret (at least not in regards to cooking). I have no private recipes handed down for generations; merely lots of experience and trial and error, combined with a bit of formal culinary education. I'll list a few of these websites in the final step below. None are the sole source for any of my information, and in fact while many reflect what I am posting, very little is influenced by these or modified from what I would have written down if I hadn't gone searching for images... so feel free to peruse the links and you may find some of THEIR secrets I don't mention or use in this instructable.