Preheat oven to 400°F (200°C). Line a baking sheet with parchment paper.
Place the kielbasa on a cutting board and slice thinly across without cutting all the way through to create the Hasselback effect.
In a small bowl, whisk together olive oil, Sriracha, honey, soy sauce, garlic powder, and smoked paprika.
Brush the sauce generously over the kielbasa, ensuring it seeps into the cuts.
Slice the kielbasa into bite-sized pieces and arrange them on the baking sheet.
Drizzle any remaining sauce over the top and bake for 18–20 minutes, or until caramelized and slightly crispy.
Remove from the oven, sprinkle with sesame seeds, and garnish with sliced green onions before serving.
