A vegetarian recipe found in “Varme Småretter” (Hot Snacks) puplished by Gyldendal in 1991
Pizza is as nutritious and as good a food as a warm cheese sandwiches.
If you want a stronger taste on the pizza, spread a little ketchup or tomato paste on the dough before adding the vegetables. As cheese you can use any firm white cheese. Mixing different cheeses works well too.