It may seem like an unusual combination, but once you’ve tried this sweet, nutty sandwich, you’ll be hooked. If you don’t have a panini maker, cook the sandwiches in a skillet and weigh them down with another pan. Or you can wrap them in foil and cook on the grill with a weight on top.
Preheat oven to 350°F. Place walnuts on baking sheet, and bake 8 to 10 minutes, or until fragrant. Cool, and finely chop.
Preheat panini maker. Spread 4 slices bread with 1 tsp. jam each. Sprinkle walnuts on top of jam, and top each with 1 slice Gruyère. Cover with remaining bread. Place sandwiches in panini maker, and bake 2 to 4 minutes, or until bread is golden brown and cheese has melted. Slice each sandwich into 4 wedges, and serve warm.