Preheat oven to 375 degrees.

Boil the potatoes until a fork goes through the potatoes easily. Drain and transfer back into the pot.

Add the ¼ cup butter and sour cream to the potatoes.

Mash the potatoes using an electric mixer or a potato masher.

Gently cook chopped onions in oil for about 3 minutes, adding garlic near the end if cooking time. **Optional step, lightly salt the onions to help draw out the natural sugars to help with sautéing.  Add ½ of the bacon crumbles to the skillet with the cooked onions and garlic and heat through.

Add the skillet mixture to the mashed potatoes and mix all together.

Transfer the mashed potatoes to a lightly sprayed 9 x 7 baking dish.

Sprinkle mashed potatoes with the shredded cheese.

Sprinkle the remaining bacon crumbles over the top.

Bake in the oven for about 10 minutes or until the cheese is nicely melted and the bacon is crisped.

Remove from the oven and let sit for a couple minutes.

Garnish with the sliced green onions and enjoy.