Preheat oven to 350 degrees. Line a baking sheet with parchment paper or a silicone baking mat.

Cut the peppers in half lengthwise. Scrape out the seeds and veins and discard.

In a mixing bowl, combine the cream cheese, cheddar cheese and mayonnaise. Stuff the peppers with the cheese mixture.

Whisk the eggs with 1 tablespoon water in a shallow bowl. Pour the breadcrumbs onto a plate and mix in the salt. Dip the peppers into the egg mixture, let the excess drain off, then dip into the breadcrumbs and coat well. Place on the prepared baking sheet.

Spray the tops of the peppers with the cooking spray and cook for 30 minutes or until golden brown. Serve warm. Can be reheated in a 350 degree oven for about 10 minutes.