Steam clams in 1 litre water in large kettle. Reserve liquid to use as clam stock. Dice the clams. Cook the potatoes separately in 2 cups of boiling water for 5-10 min. Drain. In a large pot,saute the onion, peppers, celery, & paprika in butter until the vegetables are tender, about 6 min. Add flour and Accent,stirring well so that mixture does not brown. Add clam stock, clam base, potatoes, & clams. Allow to simmer for 15 min. Add tomatoes & simmer for 5-10 min., covered. Serve. This recipe may be kept for a week. The clam base may be purchased at any fish market.