I've been a veggie since I was 6- much like MumNat once I realised where meat came from. My parents are hippies so supported me (but hoped I wouldn't manage it I think!) but I have- for 25 years now! I don't eat fish, gelatine, non-veggie cheese, cochineal etc and I actually have a bit of an intolerance to cow's milk so most of the time I have soya milk too. None of my family are veggie and neither is my OH so I have brought Mel up to eat meat although it is one of the things that he now totally rejects! Everyone thinks it's me not giving it to him!!
Living with a meat-eater I've had to learn to cook meat which is tricky when you can't taste it but I get constant feedback which helps! I do a lot of casseroles as that is an easy way to do a veggie and non-veggie version. Also stir-frys, lots of pasta sauces, bean chilli, & veggie curries.
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