Can anyone tell me the carb content of tomatoes? I've looked in my books but 2 don't mention tomatoes at all making me think its negligible and the other gave a count of 5g per medium tomato.
You need to be carefull with Tomatoes - they're great raw (in salads, for example), but when you cook with them the cooking process breaks down the carbs/sugars in the fruit, and has a much more significant effect on BGs.
Check out the difference between a raw tomatoe (~3g/100g) and a sun dried tomatoe (~20g/100g).