Begin by cooking your pasta in a large pot of salted boiling water according to package instructions until al dente. Drain and set aside.
In a mixing bowl, combine the softened cream cheese, sour cream, shredded cheddar cheese, and Sriracha sauce. Stir in garlic powder, onion powder, salt, and pepper until smooth and well blended.
Add the shredded cooked chicken, diced bell peppers, and sliced green onions to the sauce mixture. Stir until everything is evenly coated.
Fold the cooked pasta into the creamy Sriracha sauce mixture, making sure the noodles are fully coated with the spicy, cheesy goodness.
Transfer the pasta mixture into your prepared baking dish, spreading it out evenly. In a small bowl, mix the breadcrumbs with olive oil, then sprinkle this mixture evenly over the top of the pasta to create a crispy crust.
Place the baking dish in your preheated oven and bake for 20 to 25 minutes, until the top is golden brown and the sauce is bubbling around the edges.
Remove the pasta bake from the oven and let it cool for a few minutes before serving. Garnish with extra sliced green onions or a drizzle of Sriracha if you like it extra spicy!