I just cook a low carb meal and no one seems to notice. I do a soup - French fried onion, a prawn cocktail type salad or a waldorf, some kind of meat with a selection of veggies or a stew with lots of low carb veggies and finish off with something like sugar free jello topped with cream.

People generally know I'm losing weight and say things like ' I see you've given up your diet for tonight' or 'how on earth do you lose weight when you eat this lot?'...I love it!
Robert