They have the use of the Salvation Army's commercial kitchen and cook up "comfort food" for the masses.
Mrs Roseingrave said the organisation is entirely self-funded so, in between cooking meals and delivering them, volunteers also have to fundraise to keep it all going.
She said she enjoys helping people "from all walks of life" which is mainly new mothers but also includes grandmothers, single women and struggling families.
"We are there for everybody. It's good to be part of a supportive community. People don't always have family to rely on because we are quite a transient society."
Bellyful delivers many meals to rural areas such as Ponatahi and Gladstone, which Mrs Roseingrave particularly enjoys doing.
"It can be isolated and lonely for people out there - it's good for them to see a friendly face to say 'hello'."
On receiving the Pride of New Zealand nomination Mrs Roseingrave said "I'm surprised and honoured, but I can't take all the credit. I only steer the ship. I couldn't do it without the volunteers - they are always there and willing."
Go to www.bellyful.co.nz for information on how to become a volunteer.