Fresh Tomato Sauce for Steamed Ricotta Dumplings

Heat oil in a medium skillet over medium heat. Add garlic; cook until golden, about 15 minutes. Add tomatoes; season with salt and pepper. Simmer until thickened, about 35 minutes. Remove from heat. Remove garlic, and pass sauce through food mill. Sauce may be made up to 1 week in advance, and refrigerated. To serve, warm over low heat.