The cornmeal crust on this tart gives it a vaguely southwestern flavor. If you choose to use a variety of peppers in this tart, use only red and yellow, for they are sweeter than green.
To make the filling, thinly slice the peppers and onion. Heat the olive oil in a wide, shallow pan and add the vegetables. Season with the salt and pepper and cook over medium heat, stirring or tossing frequently, until the vegetables are wilted, about 10 minutes. Stir in the marjoram, pour into a mixing bowl, and cool. Place the re