Dairy Free Spinach Roll

If you want to make a dairy free spinach roll do the following.
Fry onion and spinach as per usual. Process the mixture in the food processor when it is cooked.
Add two potatoes boiled and mashed in place of the white sauce and cheese. Spice the potato with garlic and onion powder, chicken stock powder, paprika, mustard powder, salt and pepper. Play with the flavourings.
Add 200g canned lentils to mixture. Cook in butter free puff pastry.