Drain clams, pour juice into a large pot and add the vegetables. Add water to barely cover. Simmer 20 minutes or until vegetables are tender. In another pot, make a white sauce by melting the butter and then stir in the flour. Slowly add the Half & Half, salt, sugar & pepper and Chipotle Paste (to taste). Simmer until it thickens. Add vegetables and clams. Do not boil after adding the clams.