Melt butter in a stock pot, sauté carrots on medium heat until they start to get tender, about 10 minutes. Add celery and sauté another 5 minutes or so.
Add green onion and garlic, and sauté another 3-4 minutes to bring out the flavors.
Add your favorite flour (see GF options below) and keep stirring for 1-2 minutes, don't let it burn.
Now add your liquid very slowly, continuing to stir or whisk it around and it will thicken.
Add optional collagen, sea salt and pepper to taste, and keep whisking. Add in the Asiago cheese and stir to melt. Serve and enjoy.