I like to use San Marzano tomatoes, which are naturally lower in acidity and have a sweeter flavor than other canned tomatoes, in this sauce. Some brands can be expensive, but there are a few brands that aren’t bad at all. I like Bella Terra Organic San Marzano Tomatoes, which are about $3 per can. Since the rest of the ingredients in this sauce are cheap (I stock up on cheap saffron at Trader Joe’s whenever I’m visiting a place where there is one), I still make out better than buying a jar of “good” sauce. If you can’t find San Marzanos or want a cheaper option any can of whole peeled plum tomatoes will do.
Milk and butter add a layer of richness and help give the sauce its amazing texture. Full fat or skim milk will work, but you can also use almond milk or even coconut milk if that’s what you have around. I actually used Silk Simply Coconut in the sauce shown here and was very happy with the way it turned out (I had a coupon for a free half gallon of the milk, which is delicious!)