Mediterranean Baked Fish

1 lb fish fillets (sole, flounder, or sea perch)
2 tsp olive oil
1 large onion, sliced
1 can (16 oz) whole tomatoes, drained (reserve juice), coarsely chopped
1/2 C tomato juice (reserved from canned tomatoes)
1 bay leaf
1 clove garlic, minced
1 C dry white wine
1/4 C lemon juice
1/4 C orange juice
1 Tbsp fresh orange peel, grated
1 tsp fennel seeds, crushed
1/2 tsp dried oregano, crushed
1/2 tsp dried thyme, crushed
1/2 tsp dried basil, crushed
to taste black pepper