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.
We really enjoyed this French Onion Soup Grilled Cheese sandwich. I made one each for my husband and me last week on a sandwich and soup night. The more onions the better, and definitely use gruyere cheese.