Wash the cucumber, cut in half and scoop out the seeds with a spoon.
Toast the sunflower seeds in a dry non-stick pan until lightly browned, stirring occasionally.
Wash the tomatoes and cut into small cubes.
Mix the cheese in a small bowl with the sunflower seeds and tomato cubes. Season with salt and pepper.
Wash the basil, shake dry and slice the leaves. Fill the cucumber halves with the cream cheese mixture, garnish with basil and serve.