1 T olive oil
1 large onion (to make 1 cup chopped)
1 pkg. (8 oz) sliced fresh mushrooms
1 medium red bell pepper (to make 1 cup chopped)
8 large eggs
2 oz proscuitto
3/4 cup shredded Parmesan cheese
1/8 t black pepper
Recipe
Adjust broiler rack to within 4 inches of the broiler element. Turn on the broiler.
Heat the oil in a 12-inch cast iron skillet (or other broiler safe skillet) over medium heat.
Peel and coarsely chop onion, adding to skillet as you chop. Raise the heat to meduim high and add the mushrooms to the skillet. Seed and coarsely chop the bell pepper. Add it to the skillet. Continue to cook until the mushrooms are soft, about 4 minutes, stirring from time to time.
While the vegetables cook, break the eggs into a 1 qt or larger bowl. Beat the eggs with a whisk until they are foamy. Chop the prosciutto into 1/2-inch pieces and add to the eggs, along with the cheese and black pepper. Stir to mix well.
Reduce the heat to medium and pour the egg mixture into the skillet. With the back of a spoon, push to distribute the vegetables, prosciutto and cheese throughout the skillet (do not stir.)
Cook, without stirring, until just the surface is runny, about 7 minutes. Immediately put the skillet under the broiler and cook until the surface is just set but not brown, 1 1/2 to 2 minutes.
Before serving, run a knife around the edge of the frittata to loosen. Serve at once by slicing into 4 wedges.