In Indonesia, the sourness in this soup would typically come from tamarind, which can be hard to find in the United States. A shot of lemon juice works well instead.
Rather than pasta, serve the salty and spicy flavors of this classic Southern Italian dish with spaghetti squash "noodles" for a delicious, hearty vegetarian dinner.
I like this one because it's a one-pan dish-you will need a pan with a lid. You can use a can of tomatoes instead of making the purée if you wish, but puréeing the tomatoes produces a better result....