This dish is best made with leftover roast beef and mashed potatoes and gravy.
1 slice ciabatta bread, toasted
1/2 c garlic mashed potatoes
2 ounces roast beef
6 sauteed mushrooms
1/4 cup beef gravy
sea salt and freshly cracked black pepper
Drizzle ciabatta with olive oil and bake for 5-7 minutes, or until lightly toasted, at 450. Stir together beef, mushrooms, and gravy. Top toast with mashed potatoes and gravy mixture. Grate parmesan cheese over and bake for 12-15 minutes at 450. Garnish with scallions. A perfect pairing with roasted Brussels sprouts.