Place the potatoes in very salty water and bring to a boil. Cook until soft and tender, 25 to 30 minutes.
While the potatoes are cooking, start the stew. In a pot over medium-high heat, add the olive oil, carrots, corn and onions and saute until the vegetables begin to sweat, 5 to 7 minutes. Add the crushed tomatoes, stock, tomato paste and garlic. Turn down the heat and simmer until the vegetables are cooked, about 15 minutes. Season with salt and pepper and fold in the lobster and cilantro. Remove from the heat, cover and set aside. Strain the potatoes and mash. Mix in the sour cream, roasted red pepper, dill, parsley and tarragon. Season with salt and pepper. Chill in the refrigerator at least 30 minutes.
To form the cakes, grab a ball of the cooled potato mixture and pat into a 1-inch thick disc, about 3 inches in diameter. In a nonstick saute pan, heat the olive oil over medium-high heat. Fry the cakes until crispy and golden brown, about 3 minutes per side. Heat up the stew and serve with a potato cake on the side.
This recipe was created by a contestant during a cooking competition. It has not been tested for home use.