I've made this Roman recipe probably a dozen times and everyone who's tried it really likes it [1].

The strange ingredients are garum [2] and asafoetida [3]. The former is just a fish sauce, so that's not hard to substitute, but you have to find asafoetida on the Internet or at an Indian food store.

1. https://www.youtube.com/watch?v=6LynenQ5h2Y

2. https://en.wikipedia.org/wiki/Garum

3. https://en.wikipedia.org/wiki/Asafoetida