Begin by cracking, breaking, or chopping the lobster shells into pieces approximately the size of a thumb nail. This step is crucial as it will help extract maximum flavor during cooking.
In a large heavy-based pot over high heat, add a few tablespoons of olive oil. Once hot, add the chopped carrot, onion, celery, and garlic. Sauté these for about 5 to 7 minutes or until the vegetables become soft and fragrant. You want them to look translucent and slightly golden.
Next, add the chopped lobster shells and tomato paste to the pot. Stir everything together and continue to cook for another 5 to 8 minutes. This step caramelizes the ingredients, enhancing the flavors of your bisque.
Pour in about 2 to 3 liters of water, enough to cover all the ingredients by about 5 centimeters (2 to 3 inches). This liquid will form the base of your bisque.
Now, add the bay leaves, thyme, parsley, and a couple of pinches of sea salt flakes and freshly cracked pepper. Give it a good stir, and bring the mixture to a rolling boil.
Once boiling, reduce the heat to low and allow it to simmer. Maintain a gentle simmer for 2 to 3 hours. Occasionally skim off any impurities or oils that rise to the surface for a clearer stock.
After simmering, let the stock cool slightly. Strain it through a colander, allowing all the solids to drain off. Discard the solids, and pass the stock through a fine chinois at least twice to ensure it's silky smooth.
In a medium saucepan over medium heat, melt a bit of butter with a splash of olive oil. Sauté the chopped French shallots in this mixture until they start to soften and become aromatic, usually about 3 minutes.
Add a pinch of cayenne pepper and the zest of the orange to the shallots, continuing to cook for another minute or two. You want to awaken the spices and highlight the citrus aromas.
Next, add the Grand Marnier to the pan. Let it cook for a minute to evaporate the alcohol and then pour in the fresh cream. Cook on high for another few minutes before adding the strained stock.
Bring everything back to a boil and then reduce to medium heat. Allow it to simmer for another 30 minutes, letting all the flavors meld together. Afterward, pass the bisque through the fine chinois one last time for the smoothest finish.
Return it to the stove, taste for seasoning, and adjust as necessary before serving hot. Enjoy the luxurious flavors of your Homemade Lobster Bisque Recipe.