Preheat oven to 400 degrees Fahrenheit and line a baking sheet with parchment paper.
Cut the zucchini lengthwise, scoop out the insides, and cut each in half (each zucchini yields 4 skins).
In a small bowl, stir together the smoked paprika, garlic powder, onion powder, salt, and pepper. Brush each zucchini skin with avocado oil, then sprinkle with the seasoning mix.
Place the zucchini skins on the baking sheet and bake for 5-6 minutes, or until they start to soften.
Remove from the oven, sprinkle evenly with shredded cheddar cheese and crumbled bacon, then return to the oven for 8 minutes.
Turn the oven to a broiler setting and broil for 2 minutes, watching carefully for golden-brown cheese. Remove from the oven.
Garnish with sour cream and green onions if desired, then serve immediately!