Let the milk simmer together with the cream and shrimp bisque. Melt the butter in a large pot without letting it color, add the flour and stir well. Pour the cooked milk into the mixture and keep stirring vigorously until all lumps are gone. Finally, add the shrimp and cheese, along with the beaten eggs. Keep stirring until you have a smooth mixture. Pour it out onto a plate and let it set in the refrigerator.
Divide the hardened mixture into portions of 75g, roll them between your hands into an oval shape. First, roll the logs in the flour, then place them in the egg white until they are completely covered, and finally roll them in the breadcrumbs.
Place the croquettes on a plate that you previously sprinkled with gruyère.
Heat the fryer to 170°C and fry the croquettes for about 5 minutes, or until they are golden brown.
Arrange the croquettes on the plates, sprinkle with parsley, and place half a lemon on each plate.