Buy your tomatoes form your local growers and if possible when they are in season. Roma tomatoes are great for this recipe but you can use any tomatoes.
Look out, some growers market or shops do some great special sometimes. I got 10kg for $2.00. Keep the best tomatoes for your salads and the other for the sauce.
You do not need to use sugar. I do as it levels the acidity in the sauce. If the sauce is to acidic add a little bit of sugar. If you made it too sweet, add a bit of red wine.
You can use the sauce straight away and keep it for 5 days in the fridge. You can freeze it in small, convenient and keep it for at least 3 months in the freezer. As for blending tools, you can use a hand stick blender, a food processor, a thermomixer or like me I use the Nutri bullet (as long as the item is cold). Safety is paramount so always follow manufacturer’s instructions