I make mine from canned whole tomatoes

I take my enameled cast iron, put in a tablespoon or two of olive oil, low heat, add garlic.

Take the canned tomatoes, strain them, crush them in the strainer, then add them to the oil. Save the liquid.

After the tomatoes cook a while I add the liquid in slowly and stir, and add spices until it cooks down into a sauce.

Taste liberally, I like to cook off the acidity tomato flavour which means a longer cook.

If you want pizza sauce add some sugar.