1) Preheat oven to 400 degrees

2) Peel sunchokes (best you can but don't obsess) and cut into die-sized pieces

3) Large dice onion

4) Slice apple in half lengthwise and core

5) Toss all three in olive oil and place on a sheet pan on the bottom rack

6) Set timer for 20 mins and then shake pan

7) After that, shake and check more frequently

8) Remove apples when soft and let cool then peel

9) Leave sunchokes and onion in until some of the onion start to char

10) Add roasted vegetables to 4 cups liquid (stock)

11) Heat until sunchokes are soft; they may already be from the roasting

12) Puree in blender