"So I will replace that potato with legumes. A tin of black eyed peas in water, with a splash of extra virgin olive oil and herb mix will make 2 lunches for me."

Good idea, I love beany salads! I make up a batch and keep in fridge for about four or five days. Same with rice - though I usually stir fry fridged rice leftovers with a couple teaspoons of hemp oil.

I forgot to tell you that another victim of my proselytisation is my Dad. He's also cut out dairy and meat and is eating wholefoods: focusing on brown rice, wholemeal bread, beans, lentils & vegetables with occasional fish. He hasn't really got anything wrong with him that we know of, but now he's knocking on a bit, he has begun to get concerned about his usual diet high in saturated fats (especially from eating lots of butter and hard cheese) potentially mucking his heart and arteries up.