Place the cornflour in a non-reactive pan (such as stainless steel). Gradually whisk in the water to make a smooth paste then whisk in the lemon zest and juice and sugar.
Place over a medium-low heat and stir until the sugar has dissolved. Continue to cook the curd whilst stirring until it becomes very thick.
Turn the heat down to low and add the almond milk and vegan spread, stir until melted and smooth then remove from the heat.
Pour the hot lemon curd into a couple of clean (preferably sterilized) jars. Seal them and place in the fridge overnight to set before serving. Store in the refrigerator and use within a couple of weeks. You may find that after a few days the curd may separate a little, this is fine, just give it a good stir.
