Sauté the aromatics: warm the olive oil in a 5Qt stock pot over medium heat and cook the diced onion for 3 to 5 minutes until soft and fragrant. Add the chopped celery and cook another 3 to 5 minutes until everything smells cozy and inviting.
2 tablespoons olive oil, 1 large sweet onion, 1 ½ cups celery
Build the base: add 2 tablespoons of the Knorr bouillon, the chicken stock except for the reserved ½ cup, diced red potatoes, and the juice of the tinned clams. Cover the pot and bring it to a gentle boil for 4 - 6 minutes so the potatoes begin to soften.
3 tablespoons Knorr chicken bouillon, 1 qt chicken stock, 4-5 red potatoes, 13 oz clams, ½ cup reserved chicken stock
Thicken the chowder: whisk the cornstarch into the reserved ½ cup of cool broth until smooth. This keeps the soup lump free. Pour the slurry into the pot and stir. Cover again and let it thicken for 3 to 4 minutes.
3 tablespoons cornstarch
Finish with cream and clams: stir in the cup of cream, then fold in the chopped clams. Let everything warm together for a moment without boiling.
1 cup cream
Taste and Adjust: Here you can add fresh ground black pepper if desired, and an additional tablespoon of Knorr chicken bouillon if you would like a stronger flavor delivery.
Garnish and Serve: top with chives, soup crackers, bacon, or serve with sour dough.
Voila! You have created a delicious, easy homemade clam chowder in 25 minutes.