Put water and milk substitute in a saucepan. Let heat briefly, then add salt and grits. Stir occasionally.
When it begins to boil, turn down heat to simmer, cover with lid slightly off the pan, and cook another 5-7 minutes until grits are soft. Continue to stir occasionally.
Remove from heat, cover and let sit 5 minutes. Spoon into serving dishes and add a dab of margarine, then stir in strawberry jam. I prefer this cooled to just above room temperature.
Grits are ground corn. There should be nothing else in them, but check your brand for possible cross contamination issues.