Preheat the oven to 350℉. Place the bread in a food processor and process until fine crumbs form, 25 to 30 seconds. Place the crumbs on a baking sheet, spreading them evenly. Bake until golden brown, about 8 to 10 minutes.
On a plate, combine the cooled breadcrumbs with the smoked paprika, garlic powder, salt, pepper and cayenne pepper.
PREPARE THE POPPERS:
Spray a baking sheet with nonstick spray. In a small bowl, stir together the cheeses and parsley. Fill each jalapeño half with 2 teaspoons of the cheese mixture.
On a plate, combine the flour, salt, and pepper. In a small bowl, beat together the egg and the water to combine.
Dip each jalapeño half in the flour, shaking off the excess, then in the egg wash, and finally in the bread crumb mixture, shaking off the excess.
Place the coated jalapeños, cut-side-up, onto the prepared baking sheet and spray lightly to coat with cooking spray. Bake until golden brown and crisp and the cheese has melted, about 30 minutes.
Notes
If preparing this recipe as GLUTEN- FREE, just be sure to use GF bread crumbs and a GF flour blend in place of the all-purpose flour.