THE DAY BEFORE…
Make the crème fraiche by mixing the whipping cream and yogurt into a glass bowl or measuring cut until very well blended. Cover with plastic wrap and store in a warm place overnight (my favorite spot is on top of the water heater). You will be so happy the next morning when you see the mixture has thickened to the consistency of sour cream, and has a creamy, very slightly sour taste.
SOUP DAY! TO BEGIN
Prepare the asparagus:
Cut off about ¼ inch off the bottom of each stalk and discard. Soak the asparagus spears in cold water and swirl them around to make sure any sand or dirt is removed.
Cut the bottom 2 inches off of each stock – these pieces are the ‘asparagus ends’ that go into your stock mixture.
Cut the tip off of each stalk. Set aside.
Grab about 10 remaining stalks and peel them into thin ‘noodles’, using a vegetable peeler. Set aside.
Cut the remaining stalk pieces into thirds and set aside.
FOR THE BROTH
In a large Dutch oven, combine asparagus ends, onion, celery, garlic, salt and pepper. Cover with cold water (shoot for a good 6 cups of water for this), bring to a boil and reduce to a simmer, cooking until vegetables or soft, about 30 minutes. Drain off vegetables and reserve broth until needed.
FOR THE SOUP
Pour 6 cups of reserved broth into a large Dutch oven. Bring to a boil, and then add the asparagus pieces that you have cut into thirds all at once. Reduce heat and simmer until the asparagus is just tender – keep your eyes on it because overcooked asparagus turns an unappealing color which you will not like). You’ll want to check it at about 5 minutes, then every couple of minutes until done. When asparagus is tender, turn off the burner and stir in the peas.
Blend in very small batches in a blender until smooth. Return to Dutch oven, check for seasoning and add more salt and pepper if needed.
FOR THE OPTIONAL GARNISHES
Heat oven to 350 degrees.
On a cookie sheet covered with foil and sprayed with cooking spray, lay the radishes cut side down. Drizzle with olive oil and lightly salt. On the same cookie sheet, lay the asparagus tips you have reserved (I think it looks cool to cut them in half also but up to you). Roast until asparagus is tender and remove it from the cookie sheet. The radishes will take a little bit longer, so leave them in just until you can pierce them with a paring knife.
TO SERVE
Heat until warmed through and hot, but do not boil it or it will look like it’s separated a little bit.
Ladle into bowls and add a generous drizzle of crème fraiche to each bowl.
Pile a nice bunch of asparagus noodles on top and swirl around. They will soften in the hot broth.
Serve with asparagus tips and roasted radishes if you like.