Provencal Seafood Bisque

Name: Provencal Seafood Bisque
Ingredients: 3 slices bacon , roughly chopped (can substitute extra virgin olive oil or butter, 3 tablespoons); 1 medium white or yellow onion , chopped; 1 large stalk celery , chopped; 1 carrot , chopped; 2 cloves garlic , chopped; 2 plum tomatoes , chopped; 1 pound white fish fillets , roughly chopped; 1 teaspoon orange zest; Pinch cayenne; Large pinch saffron; 1 quart shellfish stock , or 16 ounces of clam juice plus 16 ounces fish stock or water; 1/4 cup heavy cream; Salt, to taste