Cook pasta as per usual instructions in a large pot of salted water. Rinse under cold water to cool the pasta and drain well 

Heat a skillet or a large pan over a medium heat. Add frozen corn and leave to char, it will take about 5minutes to start to char, give a gentle toss and repeat to all side of the corn are lightly charred 

You are looking for mostly charred or golden brown corn. Watch it closely towards the end as it can start to pop out of the pan

In a large bowl combine sour cream, oil, the juice of two limes or roughly 1.5 tbsp of lime juice. Whisk to form the dressing 

Finely dice capsicum and celery

Add drained pasta to the bowl of dressing with the corn, capsicum and celery. Mix well  

Crumble in feta and toss through gently 

Add fresh chopped coriander if using 

For extra zing and a little heat you can garish with a small dusting of chipotle orange rub if you have on hand