Cod and Veggie Gratin

Name: Cod and Veggie Gratin
Ingredients: 1 ⅔ cups waxy potatoes (peeled and diced); ½ cup olive oil; ½ bunch rosemary; ½ bunch thyme; ½ bunch Basil (leaves removed from stems); 1 red pepper (thickly chopped); 1 green Bell pepper (thickly chopped); 1 yellow pepper (thickly chopped); 4 Garlic cloves (halved or quartered); 1.333 cups shallots; 2 bay leaves; 1 organic Orange (thinly sliced); 1 cup canned tomatoes (chopped); 1 cup black Olives (in oil); 4 lemon juice; 2 cups vegetable stock; 6 fish fillets (e. g. cod, haddock)