When I am in Argentina, I often eat granola with fruit and milk.
Or I make a fruit and yogurt smoothie, using fresh fruit, lots of grated ginger, and some of the least sugary juice I can find.
Or, I may just have a cup of tea and a bit of leftover tarta de pollo, or something similar, warmed up in the toaster oven.
Since virtually every portion at a restaurant in BsAs is huge, there is never a shortage of leftovers in my fridge.
Sometimes I fry up a couple of eggs, grate some cheese on em, and eat em on toast.
Not a big sugar pastry guy, myself- they make me fell groggy all day if I eat em first thing.