Italian Tomato Sauce for Pasta

Procedure

1. Heat the olive oil in a large saucepot. Add the onions, carrots, and celery and sauté lightly for a few minutes. Do not let the vegetables brown.
2. Add remaining ingredients. (See Appendix 2 for can sizes and substitutions.) Simmer, uncovered, about 45 minutes, until reduced and thickened.
3. Pass through