Taste to check the seasoning and add more salt and pepper if you think it needs it.
Spread bread with vegan butter or spread, top with baby spinach or cress, top with egg mayo and the other buttered slice of bread, cut in half and serve.
Notes
The calories are for the egg mayo.
For a softer, less chunky vegan egg mayo, smoosh with a fork once you have made it.
Keep the egg mayo in the fridge for 3-4 days.
Take out the fridge a few minutes ahead of making your sandwich (if you have time) to take the chill off, for the best flavour.