The only thing I can think of right now is cold salads made with pasta and/or cooked meat. And sandwiches but I'm guessing you want something more 'substantial'.
i dunno about your preferences ...i mean what you like in terms of food
but i can tell you whatever can i recall
we used to eat dehi phulkiaN as lunch ...sometimes with roti too ....
then we used to have kadu ka raita , kheeray ka raita , aloo ka raita , baingan ka bhartya with dehi ....you see a lot of dehi
and a lot of salad too .....sometimes things like fruit chaat
in afternoon after a nap ....ammi always had something great for us ....sometimes shikanjbeen , sometimes imlee aur aloobukharay ka sharbat .....sometimes sattu ka sharbat ....or icecream ....everything home made ...:) missing those looong summer days