| 1 |
Preheat oven to 350 F. Melt 3 tablespoons butter in 12-inch nonstick ovenproof skillet over medium heat. Add shallots; saute 2 minutes. Add prosciutto; saute until almost crisp, about 3 minutes. Add mushrooms; saute until brown and tender, about 6 minutes. Cool mushroom mixture in skillet 10 minutes. |
| 2 |
Whisk eggs, 1 cup grated Fontina cheese, parsley, salt, and pepper in large bowl. Stir in mushroom mixture. Melt 1 tablespoon butter in same skillet over medium heat. Pour egg mixture into skillet. Cook without stirring until bottom and sides are set (top will be undercooked), about 10 minutes. |
| 3 |
Bake frittata in skillet until top is set, about 20 minutes. |
| 4 |
Preheat broiler. Sprinkle frittata with remaining 1 cup cheese. Broil until cheese melts, about 2 minutes. Using heatproof spatula, loosen frittata on all sides. Slide onto platter. |
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