
I've never liked the idea of Quorn, since although it was known to be edible and non poisonous, it was still tested on animals before being released as a foodstuff! How ridiculous is that.
I have also been told that it's off the menu for diabetics as it contains hidden sugar.
Much of India is vegetarian, and the basic diet for many is grain, pulses and dairy products, together with some fruit and veg. Apparently this is a perfect nutritional balance, so to mimic that you could eat wholemeal bread, lentils/beans, plus cheese/yogurt/milk.
I visited a family in India, friends of friends, basically poor subsistence farmers who rented out a spare mud hut to intrepid backpackers, and was invited to share chappatis and chai (milky tea) with the family, while helping the children with their English homework! They couldn't even afford rice very often, but chappatis and dhal with dairy formed their everyday diet.