For the pizza rolls, first prepare a bechamel sauce. To do this, melt butter, add the flour and let it foam.
Slowly pour in milk, whisk until smooth and boil away. Let the sauce cool down. Chop the kielbasa, gouda, peppers and tomatoes into small cubes and stir into the béchamel sauce with the corn.
Season to taste with oregano, salt and pepper. Spread on toast and bake in preheated oven at 180 °C (hot air) for 10-15 minutes.