Grilled cheese with gouda, roasted mushroom and onions. Roast mushrooms and onions with olive oil about 20 minutes. Layer shredded gouda on bread, then mushroom/onion mixture, then gouda. Top with bread and fry like grilled cheese.
Croque Madame Muffins by thesplendidtable: Croque Monsieur is essentially a toasted cheese and ham sandwich. Put a fried egg on top and you've got a Croque Madame (the egg is supposed to resemble a lady's hat).