SYDNEY - With a twist of lime and a dash of salt Sydney chef Nowshad Alam Rasel flavors a hot pan full of crickets, tossing them over a flaming stove.

The savory snack, which would not be out of place at a Mexican cantina or a Bangkok street stall, is creeping onto menus at Australian boutique eateries such as El Topo, challenging the inhibitions of diners.

"When they come for the first time, the customer very much wants to know what it is," says sous-chef Rasel, as he neatly plates up the fried critters, topped with slices of fresh chili.

Roasted cockroach, honey-flavored ants, mealworm and chocolate coated popcorn are now available to try and buy - and while the cuisine remains a novelty, there are signs it is growing in popularity.

Consumer attitude toward eating insects are usually split explains Skye Blackburn, owner of Australia's largest insect supplier, the Edible Bug Shop in Sydney.

"The first kind of people are completely grossed out and they really can't change their mind and they kind of just want to come and have a look and don't want to try it really," the entomologist said.

"And then we get the second kind of people that really want to learn more and some of them will try edible insects and some of them won't, but they will go away and talk about insects and they'll spread the word about what they have seen that day," she adds.

High in protein, cheap to produce, and with a much lighter carbon footprint than meat or dairy farming, bugs are already part of the diet for more than 2 billion people worldwide, according to the United Nations.

Advocates of increased consumption say it will help feed a bulging global population as land becomes scarce and climate change threatens conventional food supplies like fish.

Insects are common in diets across parts of Asia, Latin America, Africa and Australia.

But they are a difficult sell in the Western world where people struggle to dissassociate the nutritional value from the source, with most insects considered pests.

"We don't eat cow, we tend to eat steak and sausages. With pig we eat pork and bacon, so you have to start by naming them something else," said one El Topo patron.

Blackburn is leading the charge to change the perception of edible insects with creations like mealworm and chocolate coated popcorn, and green tea and honey-roasted black ants.

But it may be some time before bugs become a staple in Australian homes.

Nine-year-old diner Alexandria winces as she samples the fried crickets at El Topo.

She concludes: "It feels awkward and weird that you're eating an insect. You would normally eat meat."