Preheat the oven to 375°F. Line a baking sheet with parchment paper or lightly grease it.
Slice the mini sweet peppers in half lengthwise. Remove the stems, seeds, and ribs. Arrange the pepper halves cut-side up on the prepared baking sheet.
In a medium mixing bowl, combine the softened cream cheese, shredded cheddar cheese, everything bagel seasoning, crushed red pepper flakes, and salt. Stir until smooth and well combined.
Spoon the cream cheese mixture evenly into each pepper half, slightly mounding the filling.
Bake for 10 minutes, or until the filling is heated through and lightly golden on top.
Remove from the oven and let cool for 2–3 minutes before serving. Garnish with additional everything bagel seasoning if desired.
Notes
For a milder version, omit the crushed red pepper flakes.
Pepper Jack cheese can be substituted for cheddar for an extra kick of heat.
Finely chopped chives or green onions make a great addition to the filling.
Store leftovers in an airtight container in the refrigerator for up to 4 days.