• Bring a large pot (I used my large Le Creuset, 7 qt) with water.
• Peel the potatoes and cut them in quarters. Once the water is boiling, add potatoes and cook until tender, about 20 minutes.
• Preheat the oven at 400F.

For the meat

• Chop finely the onion and garlic.
• In a hot skillet, pour olive oil, the chopped onion and garlic. Cook until soften and golden.
• Add sausage meat and crumble it as it cooks until there is no more pink. Set aside.

For the mashed potatoes

• Once the potatoes are cooked, drain the water and put potatoes back into the pot.
• Add the milk, butter and salt and using a potatoes masher, mash your potatoes.

Assembling

• Pour the sausage meat in the baking dish and cover it with the mashed potatoes.
• Generously spread the grated cheese on top.
• Place in the oven for 20 minutes or until the cheese is golden brown.