Created by lazyme on April 27, 2019
Step 1: Roast peppers on racks of gas burners over high heat, turning with tongs, until skins are blackened, 10 to 12 minutes. (Or broil peppers on a broiler pan about 5 inches from heat, turning occasionally, about 15 minutes.) Transfer to a bowl and cover tightly with plastic wrap, then let stand 20 minutes.
Step 2: When cool enough to handle, peel peppers, discarding stems and seeds, and cut into 1/3-inch dice.
Step 3: Preheat oven to 350°F.
Step 4: Sift together flour, salt, and baking powder into a small bowl.
Step 5: Beat eggs in a large bowl with an electric mixer at medium-high speed until doubled in volume, about 3 minutes. Add butter, flour mixture, and cheeses and mix well at low speed, then stir in peppers and scallions.
Step 6: Pour into a buttered 10-inch (6-cup) glass pie plate and bake in middle of oven (or lower third of oven if baking with bacon at the same time) until top is golden brown and a tester comes out clean, 30 to 35 minutes.
Step 7: Let stand 5 minutes before serving.