Begin by infusing the cream. To remove the lobster meat from the shells, use a sharp pair of kitchen shears to cut down the back of the lobster tail, then carefully release the meat from the shells.
In a large saucepan, combine the cream, wine, onion, smashed garlic cloves, fresh herbs, and lobster shells. Add a generous pinch of salt and pepper. Bring the mixture to a simmer, cover, and let it cook for 10 minutes.
Reduce the heat and allow the cream to infuse for another 20 minutes. Strain out the solids, reserving the infused liquid.
To prepare the pasta sauce, heat a tablespoon of butter in a large frying pan over medium-high heat. Add the minced garlic and cook for about 30 seconds.
Pour in the infused cream and stir. Add a squeeze of fresh lemon juice and let the sauce simmer for 5 minutes.
Cut the lobster meat into chunks and add it to the sauce. Allow it to poach gently for 3-5 minutes, or until just cooked.
Season the sauce with salt, pepper, and an additional squeeze of lemon juice if needed. Toss the sauce with al dente pasta, adding reserved pasta water as necessary to achieve the desired consistency.