Smoked Gouda and Prosciutto Panini Sandwich
Brush both sides of the slices of bread with olive oil or butter. Assemble the sandwich layers as follows: prepared bread, smoked gouda, prosciutto, onions, tomato, fontina, and bread. Place in a panini press (or in a heated grill pan or saute pan pressed with another heavy pan) and cook until crisp and golden. Serve immediately.