Foods for "plop-able" poos?

I am getting really sick of scraping our 15mo's sticky, slopping poos into the toilet. After the weirdness of starting solids at 6mo, she'd settled into nice neat poos that plopped off easily into the toilet. I thought my fears about cloth+solids were totally unfounded. Now for the last 2-ish months every single poo has been horrible. No changes in diet aside from a bit of an increase in summer fruit (we're in the southern hemisphere). Any suggestions for dealing with this? LO will eat pretty much anything we put in front of her. Are there any foods to try or avoid to go back to those wonderful plopable poos?