This week's lunchtime masterclass is with food blogger and founder of the underground restaurant movement Kerstin Rodgers, aka msmarmitelover.

Kerstin launched the underground restaurant movement, or supper clubs, in the UK in 2009 by starting a restaurant in her living room. Her blog marmitelover.blogspot.com followed her exploits, becoming one of the most read food blogs in the UK.

In 2011 her book Supper Club: recipes and notes from the underground restaurant was published by Harper Collins.

Kerstin ran her themed supper club at Camp Bestival and Bestival in 2011 and 2012 and innovated the first underground farmers markets and night markets - which are like mini festivals - comprising food demos, street food, DIY food and live music.

Forget Pippa Middleton, this is the woman who can really tell you how to entertain - a skill even the most inhospitable of us need at Christmas.

Are you in search of festive food tips? Or perhaps you want ideas on decoration or how to serve the ultimate Christmas cocktail? Whatever your question, join our live chat with Kerstin this Tuesday at 1pm, in the comments section below.

This web chat is now live - come join in with your questions in the comments section below

Web chat special: Kerstin Rodgers