Place the finely chopped broccoli in a microwave safe dish and add ¼ cup water. Cover with plastic wrap and microwave for 1 minute. Drain water and discard plastic wrap. Add the mashed potatoes, 2 cups shredded cheese, salt, garlic powder and pepper to the bowl and stir to combine.
Transfer mixture to a 2 quart casserole dish that’s been lightly coated with non-stick spray. Smooth out the top of the potatoes and bake for 30 to 35 minutes, until the center is hot.
Meanwhile, cook the bacon until crisp and then crumble into small pieces.
Remove potatoes from oven, top with remaining 1 cup shredded cheese, crumbled bacon and diced green onions. Return to oven for another 5 minutes, until cheese is melted. Let sit for a few minutes before enjoying.
*Potatoes do not need to be heated prior to baking.