Preheat oven to 450 degrees.

Melt 3 tablespoons duck fat in a small saucepan, using a pastry brush lightly brush some onto a cookie sheet.

Chop both the sweet potato and 3 small Idaho potatoes or whatever white potatoes you have on hand into small pieces so that the asparagus and potatoes will roast evenly. I cut the asparagus into 2-3 inch pieces. Be sure to cut off the hard end pieces of the asparagus & throw away or if you have a garden use it as compost.

Using a pastry brush, brush melted duck fat onto all sides of the potatoes and asparagus. Sprinkle with salt and black pepper. Roast at 450 degrees for 15 minutes, stir than roast for another 20 minutes or until veggies are slightly crisp on the outside and soft on the inside. .

Sprinkle veggies with parmesan cheese, roast for another 10 more minutes or until cheese is melted and lightly browned. Trader Joe's has an inexpensive but delicious raw milk parmesan reggiano cheese. Now it's ready to serve!