Bring a large pot of water to a boil. Salt it and cook the pasta to al dente. Drain and reserve.
Pre heat the broiler.
Melt the butter in a saucepan over medium heat.Whisk in the flour, cook for 1 minute, then raise the heat a bit and add the beer or chicken stocl. Reduce until almost evaporated, then whick in the honey or maple syrup and milk. season with allspice, mustard, cayenne, a little freshly grated nutmeg and some salt and pepper. Thicken to coat a spoon, couple of minutes, then taste to adjust the seasonings.
Whisk in the pumpkin puree, then stir in about 2 cups grated cheese with a wooden spoon until melted. Combine the pasta with the sauce and arrange in a casserole dish. SPrinkle with the remaining cheese and a light dusting of paprila. Broil to brown and bubble. Garnish with chopped chives.