TIPS AND VARIATIONS: Add pepper and thyme during last 10 minutes of cooking. The timing is important here-- add the thyme earlier and you'll lose its flavor, add the pepper earlier and it drowns out all the other flavors. I also sometimes add oregano, which can be added at any time during cooking. To make pizza sauce, double tomato paste. To make vegetarian sauce, leave out the meat. I have tried making this sauce with ground turkey instead, and we thought it was terrible. I have, however, made delicious versions by cooking lamb neck slices or chicken breasts in the sauce instead of the ground meat. Just brown first and cook as usual.