01 - Preheat the oven to 400°F. Line a baking sheet with parchment paper.
02 - Cut each jalapeño pepper lengthwise and carefully remove seeds and membranes using a spoon, wearing gloves as needed for safety.
03 - Combine cream cheese, grated cheddar, chopped spring onion, minced garlic, chopped cilantro (if using), smoked paprika, salt, and black pepper in a medium bowl until smooth.
04 - Generously fill each jalapeño half with the cheese mixture, smoothing the surface evenly.
05 - If desired, toss breadcrumbs with olive oil and sprinkle evenly over the filled jalapeños to create a crunchy topping.
06 - Arrange stuffed peppers on the prepared baking sheet and bake for 18 to 20 minutes until filling bubbles and breadcrumbs turn golden brown.
07 - Remove from oven and allow to cool for 5 minutes before serving.