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1
Make the stew base.
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2
Heat a large stew pot or Dutch oven over medium heat with the olive oil.
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3
Add the onions and saute until tender, about 5 minutes.
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4
Add the garlic, season with salt and pepper to taste, and cook 2 minutes more.
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5
Stir in the tomato paste and cook for 1 minute.
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6
Add the wine, and use a wooden spoon to scrape up any browned bits in the pot.
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7
Simmer the wine until reduced by about half.
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8
Add the tomatoes, peppers, parsley, thyme, and bay leaf and cook for 5 minutes.
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9
Add the stock or broths; bring to a boil, then adjust the heat to maintain a gentle simmer.
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10
Cook the base, with a cover slightly ajar, for 30 minutes.
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11
(The base may be prepared ahead up to this point, refrigerated for 1 day or frozen for 1 month).
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12
Finish the Cioppino.
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13
Bring the base to a simmer.
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14
Add the basil and the clams, and cook covered, over high heat, for 5 minutes, or just until the clams open.
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15
Add the crab and cook for 1 minute.
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16
Add the mussels, shrimp, squid, and scallops.
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17
Cook, stirring frequently, until the mussels open, the shrimp curl, and squid and scallops are just firm, about 3 minutes.
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18
Serve in large heated bowls with plenty of crusty bread.