<human>:  How do I make a simple tomato sauce?
<bot>: To make a simple tomato sauce, you will need a can of crushed tomatoes, one small onion, some garlic cloves, olive oil, a pinch of salt and a pinch of sugar. Begin by heating a few tablespoons of olive oil in a skillet over medium heat. Add the chopped onion and garlic, and sauté until they are softened, about 5 minutes. Pour in the crushed tomatoes, add a pinch of salt and a pinch of sugar, and stir. Lower the heat to low and simmer until the sauce thickens, about 15 minutes. Taste and adjust the seasoning as needed. Enjoy your simple tomato sauce!