Preheat oven to 400
Add 3/4 of the red onion, curry powder, oil, and rice to a sheet pan and mix to combine, making sure rice is coated in curry oil
Add undrained cans of beans, coconut milk, crumbled stock cubes, and a good pinch of salt to the pan, and stir everything until evenly combined
Cut paneer to bite sized chunks and add them on top of rice mixture
Bake for about 40 minutes, or until paneer is golden and rice is no longer super wet looking
Add remaining ingredients to food processor and blitz until combined
Add remaining red onion to the top of the bake once removed from the oven, then dollop on the green sauce, leaving some for additions later