Heat your butter or oil in a large stockpot and sauté the onion, carrots, celery, potatoes, and garlic for 5-7 minutes over high heat. Stir frequently.
Stir in the corn, and zucchini.
Add broth, milk, and seasonings. Bring to a boil, then reduce the heat and simmer, covered for 20 minutes.
Once your chowder is done, add a few ladles in blender, about half of it and blend until smooth, then return to the pot, stir and continue to simmer for 3-5 minutes.
Garnish with fresh herbs and enjoy!