Charles Vincent, thanks, but I've read it and to my mind 'Insects as Sustainable Food Ingredients' is better. Also 'Insects as food and feed: from production to consumption' (https://bit.ly/2zfEXEL) is more relevant, but they are not free (even we can't pirate the latter yet).
I have reared mealworms for 5 years, being part of my reseaerch. The simplest method to rear mealworms is to provide cut potatoes plus bran in large bowls and to cover the top of bowl with cloth. leave the bowl untouched for about 15 to 30 days. you can also read my paper.
A comparative toxic effect of Cedrus deodara oil on larval protein contents and its behavioral effect on larvae of mealworm beetle (Tenebrio molitor) (Coleoptera: Tenebrionidae).