I make something similar - with variants.

Instead of cornmeal, I mash up a can of butter beans or white beans or chickpeas and sometimes add a small amount of flour.

The two main variations I have made are:

"Mexican" with corn kernels, red capsicum and chilli through it and grated cheese mixed in and on top.

Zucchini with grated zucchini - and other available veg - with grated cheese in and on it.

A good standby for a quick meal and very good as leftovers.

The mashed beans/chickpeas makes it high in fibre but in fact the mash looks and acts like mashed potato. A sneaky way to add fibre without ruining a dish. I use them for making fish cakes instead of mashed potato, too. Yum!