Peel and thinly slice the onions, then set them aside.

Heat a skillet over medium heat and add the olive oil.

Add the onions to the hot oil and stir occasionally until browned and caramelized, about 40-50 minutes.

While the onions are cooking, wash and chop the potatoes into small pieces.

Heat a pot of water to a rolling boil, then add the chopped potatoes and cook for 20 minutes until fork tender.

Drain the water from the pot and mash the potatoes.

Add the butter, kosher salt, and half & half (or non-dairy milk) to the mashed potatoes and mix until smooth.

Remove half of the caramelized onions from the skillet and mix them into the potatoes, along with the grated parmesan cheese.

Stir to incorporate the onions and parmesan fully.

Transfer the mashed potatoes to a large bowl and top with the remaining caramelized onions, chopped chives, chopped thyme, chopped sage, and melted butter. Serve and enjoy!