1Heat olive oil in a pan until it shimmers. Sauté onions until softened, about 3 minutes. Add garlic and cook for 2 more minutes.
2Add basil, red pepper flakes, salt, sugar, and butter; stir and cook for 1 minute.
3Add half a can of crushed tomatoes, scrape the pan, reduce heat, and add remaining tomatoes and water. Simmer for 10-60 minutes, stirring occasionally and adding more water if needed to adjust consistency
Ingredients
2 tablespoons olive oil
1 medium onion, finely diced
3 cloves garlic, minced or put through a garlic press