Pour 2 cans of crushed tomatoes in a skillet with a drizzle of olive oil and salt, and let it boil down for 20 minutes. This sauce can be used for all your Italian recipes, from pastas to pizzas to meats. It's especially useful for pizzas because it won't soak the crust, and it helps concentrate the flavors in pasta sauces. Feel free to jazz it up it by adding basil, oregano, crushed red pepper, ground pepper, garlic, etc.