Odd (but reasonable) things to add to mac&cheese

The first thing that came to mind. The tandoori spice would go so well with the rest of the mac and cheese.

And now my mouth is watering.

Imho, mac and cheese can be too heavy. Adding raw tomatoes gives the dish a bit of crunch and some of the freshness it's lacking.

To make the dish more multi-dimensional

This is kind of a cop-out for me, as I'd add soy sauce to just about anything. It provides such a nice salty flavor.

You might want to avoid others after eating this, but it would definitely be good