Chunky Tomato Base

Name: Chunky Tomato Base
Yield: Makes 10 cups (2.5 l)
Ingredients: 5 pounds (2.25 kg) ripe red tomatoes, cored and cut into 1-inch (2.5-cm) cubes; 6 tablespoons (100 ml) olive oil; 2 medium onions, cut into ½-inch (1-cm) cubes

Preparation info