Cook the spaghetti, refresh and set aside in the water. Blend the prawns to obtain a smooth purée. Blend the poultry with the salt and pepper to obtain a sticky paste. Gradually add the Cream Cheese, prawn purée and cream and blend. Add a pinch of curry powder and the chopped shallots.
To make the roulade, place the spaghetti strands side by side on a sheet of baking paper. Using a piping bag and nozzle, pipe the filling on top in a cylinder. Roll up the roulade by wrapping it in film. Steam gently for 10 minutes. Leave to rest in the fridge before slicing.
Fry the chicken breasts gently to cook. Fry the prawns without browning. Cook the onions and asparagus in boiling water then toss in butter.
Brown the prawn heads and shells in oil over a gentle heat. Add the chopped garlic, the chopped shallots and onions then cook for 1 to 2 minutes. Deglaze with the Brandy and reduce. Add the white wine and reduce, then add the tomato pulp. Cook over a gentle heat for 15 to 20 minutes. Strain. Reduce to a glaze then add the cream. Boil for 1 to 2 minutes, season and blend to obtain a foam.
Arrange all the elements on a presentation dish and spoon on the sauce.