How does she feel about frozen or previously-frozen fruit? Or canned fruit?

Can you buy her a couple of bricks of tofu and a couple of possible blending agents and let her sit down with a blender and experiment a bit? You could get some frozen mixed fruit and maybe a little sugar and let her try small batches of tofu/fruit blends to see if anything is palatable. (I suggest frozen fruit mostly because it's much cheaper than the fresh kind -- you'd probably want to thaw it before blending it with tofu, though maybe not, the results would be slightly different for each.)