In a large bowl, stir together the mayo, egg yolk, smoked paprika and honey. Stir in the sautéed onion mixture, quinoa, the beans and the broccoli. Add in the oats and the cashews. Use a potato masher or fork to smash the mixture together until it is somewhat combined. Take 1/3 of the mixture and place it back in the food processor. Pulse it a few times until it’s all very finely chopped and combined, then transfer it back to the large bowl. Stir in the cheddar cheese, salt and pepper. Mix everything together (I suggest using your hands – it will be sticky!) until combined.