Image credit to: Chris McIntosh
Bring slightly salted water to a boil in a medium pot.
Peel potatoes or leave skins on, and cut into 1/2-inch chunks. Roughly chop the broccoli into small chunks. Boil potatoes and broccoli together for 20 minutes, stirring occasionally.
Drain the potatoes and broccoli into a colander or sieve, then return them to the pot and add the butter, cream, salt, pepper and garlic powder. Use an electric mixer or potato masher, blend the ingredients until smooth.
Add asiago cheese. Season to taste, and serve warm.