Slice the zucchinis in half lengthwise and scoop out the seeds using a spoon, creating boats. Brush the insides lightly with olive oil, and season with salt and pepper.
Place the zucchinis on a baking sheet, cut side up, and bake for 10 minutes to soften them slightly.
In a mixing bowl, combine the shredded chicken, buffalo sauce, cream cheese, half of the cheddar cheese, and half of the green onions. Mix until well combined.
After the zucchinis have baked for 10 minutes, remove them from the oven and fill each zucchini boat with the buffalo chicken mixture, packing it gently.
Sprinkle the remaining cheddar cheese on top of the stuffed zucchinis. If using, add the blue cheese crumbles on top.
Return the baking sheet to the oven and bake for an additional 15-20 minutes, until the cheese is melted and bubbly.
Once done, remove from the oven and let them cool slightly before serving. Garnish with the remaining green onions.
Notes
Adjust buffalo sauce to taste for desired spiciness.