frying onions, garlic, bacon ...
baking bread or cakes, expecially if they've got cinnamon or mixed spice in them ...
chopping parsley or mint...
roasting chicken, but also roasting tomatoes or peppers...
anything givng off wafts of coconut or gingery broth ...
and when really really hungry, somehow even the smell of potatoes being boiled is almost unbearably savoury, enough to drive you to fish one of the spuds right out of the water and eat it then & there.