10 basil leaves

1. Combine the tomatoes, the onion, and 2 tablespoons of the oil in a medium pot and salt to taste. Place over medium heat and bring to a simmer. Simmer gently until all the liquid has evaporated, 30 to 45 minutes.

2. Puree the sauce through the medium disk of a food mill. Stir in the remaining 2 tablespoons of oil and spoon sauce over gnocchi. Garnish with basil leaves and serve immediately.