In a bowl, mix together the ingredients for the omelet, then heat the oil in a nonstick skillet.
Pour the beaten omelet mixture into the hot skillet and begin cooking over medium heat.
Mix the filling ingredients and spread them over one half of the omelet. Once the bottom of the “egg” pancake has turned a nice golden brown, fold the empty half over the filling and cook, covered, for a few more minutes.
Flip if necessary. Serve with bread and vegan mayonnaise.