Place all the ingredients for the sauce in a saucepan and bring to a boil over medium-low heat. Simmer for another 10 minutes, stirring frequently. Set aside.
Cook the pasta according to package directions, or until al dente.
In the last five minutes of cooking add to it the cauliflower separated into small florets.
Add the cauliflower and pasta in a bowl. Add to it the kala chana, barbecue sauce and capers.
Mix well and serve.