Heat the olive oil and butter in a pot over a medium heat. Add the spring onion, red onion, thyme, garlic and chilli. Season with a pinch of salt and pepper. Saute until soft.
Add the maize meal and vegetable stock. Whisk through thoroughly for 2 minutes, until cooked and thickened.
Remove from the heat and add the parmesan.
Adjust seasoning.
Press the mixture into the lined dish so it’s 1cm thick. Press evenly, then place in the fridge and allow to set for at least one hour.
Remove from the fridge and flip it out onto a board. Slice into even sized triangles and brush with olive oil.
Heat a griddle pan on high heat. Grill the triangles so they are charred on both sides.