Prep the oven and pan: Heat your oven to 400°F (205°C). Line a large baking sheet with parchment and brush with a little olive oil to prevent sticking.
Prep the peppers: Slice mini peppers in half lengthwise and remove seeds and membranes. Toss the halves with a small drizzle of olive oil and a pinch of salt.
Make the filling: In a large bowl, stir together the softened cream cheese, low-sugar BBQ sauce, garlic, smoked paprika, onion powder, black pepper, and salt.
Fold in the shredded chicken, 1 cup of shredded cheese, and most of the green onions (save a little for garnish).
Stuff the peppers: Spoon the chicken mixture into each pepper half, packing it in so it’s level with the edges. Don’t overfill or it may spill as it bakes.
Add cheese: Sprinkle the remaining 1/2 cup shredded cheese over the tops for a bubbly, golden finish.
Bake: Arrange peppers cut side up on the prepared sheet. Bake for 15–18 minutes, until the peppers are tender and the cheese is melted and lightly browned.
Finish and serve: Let cool for 5 minutes.
Garnish with remaining green onions and any optional toppings. Serve warm.