Best, I think, with a good flavourful English sausage like Cumberland
Flour does the heaviest lifting in this dish, acting not merely as a filler but as a structural matrix that traps expanding steam. Whisking eggs directly into the flour before adding liquid prevents lumps by creating a thick paste where gluten strands develop smoothly under mechanical shear. Achieving the correct viscosity requires treating the milk addition as a variable; pour it slowly until the batter matches the exact thickness of pouring custard. Letting this batter rest at room temperature relaxes the gluten network, ensuring maximum puff once it hits the heat.
Success depends entirely on thermal shock. Heating oil in a skillet on the burner until it smokes hot ensures the batter bubbles instantly upon contact, driving rapid vertical rise. Sausages must be browned on one side prior to pouring the batter so rendered fat seasons the pan while keeping the meat from overcooking during the bake. Set the oven to 200 degrees Celsius and resist opening the door for the first 20 minutes, as dropping the ambient temperature prematurely collapses the rising batter structure before the starch sets. Pair this heavy dish with sharp greens dressed in sharp vinegar to cut through the rich meat and egg fats.