Add 2 tbsp. olive oil to a nonstick deep skillet or Sauté Pan and heat over medium low (do not use a saucepan, you want something with a wide surface that will allow the sauce to reduce).  Add the onions and cook for several minutes, stirring frequently until they are fragrant and translucent.  Add the garlic and cook for another 30 seconds, be careful not to let it burn.

Next add the tomato paste.  Using paste gives the sauce body and makes it less watery.  Make a space in the center of the pan and drop it in, then let it toast for a minute before stirring it into the onions and garlic.

Now add the sauce and/or whole peeled tomatoes (break them up with your hands first), brown sugar, pepper, basil and oregano.  I do not add sugar to a meat sauce, but for a marinara I love just a tablespoon of sugar or brown sugar per large can of tomatoes.

Stir it up, cover and simmer on low for about 30 minutes, stirring occasionally.  A simmer mat is great for maintaining a low, gentle simmer and you don’t have to worry about burning your sauce.

When finished, remove the lid and let the sauce sit for 15 minutes.