Peel and slice the eggs & potatoes. Finely chop the sundried tomatoes. Slice the tomatoes into circles.
Grease 2 individual ceramic (oven-proof) dish then lay some potatoes then a few egg slices in the bottom. Scatter some basil leaves and sundried tomatoes on top.
Now scatter half of the crayfish on top. Peel the chorizo and crumble the sausage meat all over. Add more basil leaves and cover with tomato slices. Drizzle with some olive oil and season with salt and pepper.
Cover with mozzarella slices if you prefer the cheesy version.
Bake in a medium hot oven ( at about 180°C) for 20-30 minutes, until golden.
Serve hot.