A seething mass of larvae in the kitchen is not everyone's cup of tea, particularly for squeamish Westerners. But for two young Austrian entrepreneurs, it's a food revolution that can help save the planet.

Katharina Unger and Julia Kaisinger, 25 and 28, have developed a device to breed in the comfort of your own home the protein-rich grubs of the meal beetle, to then eat.

"With this current design you can make 200-500 grams of mealworms every week," Unger said at a recent tasting and fundraising event in Vienna.

"You freeze them and then you make them like any other type of meat. You can cook them, roast them, make them into burger patties and mix them into sauce for pasta," she said.

Into the top of the sleek, white "desktop hive" go pupae which then hatch into adults. In the next section, the "loveshack", the insects mate and their eggs fall into the next layer.

Helped by a controlled microclimate, the eggs hatch into larvae which gradually grow and descend to a drawer at the bottom where, around 3 centimeters long and plump, they are "harvested".

"Our team eats them almost every day," Unger said, showing off some of her creations－Greek salads topped by toasted grubs, quinoa-and-mealworm meatballs and even chocolate (and worm) cake.