Not read this whole thread but my local Pakistani grocers often has offers on big 700g bags of what they call luxury fruit and nut mix, two for twelve quid and its bloody good, loads of walnuts, cashews, sultanas, almonds. Bought for baking but realised that a small bag of that was easily lunch on a hike, maybe add a muesli bar from Lidl or any cheap supermarket offer, an apple and you’re done.
Teaching granny to suck eggs I guess but if you dont know Asian supermarkets are usually way cheaper for lentils, dried pulses and spices.