I don’t shoot any less food, but I do shoot a lot more with my iPhone, simply because it’s the quickest and most readily available when time is pressing i.e. when you want to eat! I tag all my food photos on my instagram with #mpg_food on Instagram, you can easily pull them up as below.
I have done the same for various places I have visited or other categories I want to share as a set on instagram. In fact, I’ll probably start adding those links with instagram tags and photos to relevant blog posts since I almost never shoot the same thing, the same way with my phone, as I do with my other cameras.