Tomato Sauce

Peel the onions and garlic. Slice the onions into thin rings, and finely dice the garlic. Heat the oil in a pot, and sauté the onions until soft. Add garlic and cook briefly.

Blanch the tomatoes in boiling water for a few seconds. Remove the tomatoes and rinse the tomatoes under cold water. Peel the tomatoes, and coarsely chop. Add the tomatoes, vinegar, 125 ml (approximately 4 ounces) of water, and the sugar to the pot with the onions. Season to taste with salt and pepper. Bring to a boil, stirring constantly. Reduce the heat to medium and simmer for 1 hour, stirring constantly.