PREP: 25 minutesBAKE: 15 minutesSTAND: 5 minutesOVEN: 450°F (230°C) / 232°CMAKES: 4 servings
Preheat your oven to 450°F (232°C). Generously grease two 14- to 16-ounce baking dishes or four 8- to 10-ounce au gratin dishes. Halve the poblano peppers lengthwise, removing all seeds and membranes.
Bring a pot of water to a boil and immerse the peppers for 3 minutes to soften them slightly.
Drain immediately and place them inverted on paper towels to dry completely.
Arrange the pepper halves, cut-sides up, in your prepared baking dishes.
Sprinkle the shredded cheese and finely chopped jalapeño evenly inside each pepper half.
In a medium bowl, whisk together the egg or egg substitute and milk until combined.
Add the flour, baking powder, and cayenne pepper, and beat until the batter is completely smooth.
Carefully pour the egg batter evenly over the cheese-filled peppers in the dishes.
Bake, uncovered, for about 15 minutes, or until the egg mixture is puffed, golden, and a knife inserted into the center comes out clean.
Let the dishes stand for 5 minutes before serving.
Top with pico de gallo, picante sauce, or a dollop of sour cream, if desired.