Basic Marinara

3 tablespoons olive oil
3 cups chopped yellow onion (about 3 medium)
1 tablespoon sugar
3 tablespoons minced garlic (about 6 cloves)
2 teaspoons salt
2 teaspoons dried basil
1 1/2 teaspoons dried oregano
1 teaspoon dried thyme
1 teaspoon freshly ground black pepper
1/2 teaspoon fennel seeds, crushed
2 tablespoons balsamic vinegar
2 cups fat-free, less-sodium chicken broth
3 (28-ounce) cans no-salt-added crushed tomatoes

Heat oil in a large Dutch oven over medium heat. Add onion to pan; cook 4 minutes, stirring frequently. Add sugar and next 7 ingredients (through fennel seeds); cook 1 minute, stirring constantly.

Stir in vinegar; cook 30 seconds. Add broth and tomatoes; bring to a simmer. Cook over low heat for 55 minutes or until sauce thickens, stirring occasionally. Makes 12 cups