Instructions

1. Heat a 12-quart pot with 8 quarts of water along with the salt, parsley stems and peppercorns. Bring to a boil and add lobsters. Cover and once boiling, set timer for 13 minutes. (larger lobsters will take up to 15 minutes). Partially cover during cooking and watch for the water if it foams up and spills over. If it does, remove cover and place back on more askew.
2. Remove the lobsters with long handled tongs to a sheet tray to cool and boil the water to reduce down to 4 quarts (one gallon). You will use this to cook the pasta. Remove the parsley stems and peppercorns and discard.
3. Break off the tails and claws with knuckles and remove the meat. Save the liquid that pours out and add to the pasta water. To remove tail meat, place the rounded part of the tail in your palm and squeeze.The underside of the tail will split open and just pull out the tail meat. Pull off the flat strip on the outside of the tail and remove the intestinal track and discard. What remains will be the tail piece and the long flap you pulled off. Cut these into bite sized pieces and set aside. For the claws, gently break off the small part of the claw and work it off leaving the meat connected. If the meat comes off with that piece, you will need to fish it out. With the back of a knife, crack the big part of the shell and open up to remove the claw meat. Cut into bite sized pieces and add to the tail meat and set aside.
4. Preheat the oven to 375 degrees F and place the oven rack on the top third of the oven with a sheet of foil on the rack below to catch drips.
5. Heat the pasta water to a boil (we transferred it from the 12-quart pot to a four-quart pot).
6. While the pasta water is heating, in a four-quart pot, melt butter over medium heat and add onion. Cook for five minutes or until the onions are soft and just starting to turn brown.
7. Add flour and lower the heat slightly. Stir and cook this mixture for three minutes or until the raw flour smell is gone. Bring the heat back to medium.
8. Once pasta water boils, add the pasta and cook about two minutes short of the box directions. If the pasta cooks before the sauce, just shut off the burner until you are ready for it.
9. Combine the milk and cream in a measuring cup and add this to the butter/flour mixture one third at a time. As you add each third, stir with a whisk. The first addition will be thick and then each subsequent third will thin down.
10. Keep the heat on medium and stir in two cups of the cheddar, the mascarpone, nutmeg, mustard, cayenne, salt and pepper and stir until the cheese has melted into the sauce.
11. Using a spider or strainer, scoop out the pasta and add to the sauce, then the lobster meat. Stir to combine and remove from the heat.
12. In individual baking dishes, divide the lobster macaroni and cheese into the dishes. We used 8-ounce dishes and filled five, however your size may vary from ours, so fill each almost to the top.
13. Divide the last cup of shredded cheddar over the tops of each.
14. In a medium sauté pan, place all topping ingredients and cook over medium heat until browned, about five minutes. (You can do this step ahead of time if you wish.)
15. Divide the topping over each dish and place in the oven right on the oven rack. As they cook, they will drip over a bit so don’t forget that foil.
16. Bake for 15 minutes until hot and bubbly then serve.