Fish Soup without tilapia ginger vegetables potatoes meat

2 Tbsp. extra virgin olive oil 2 c. thinly-sliced onions     Salt to taste     Freshly-grnd black pepper to taste 1 c. thinly-sliced fennel 6 x baby[...]

3 lb fish bones see * Note 1 sm onion quartered 1 sm celery stalk with leaves 3 x garlic cloves 1 x bay leaf 4 x peppercorns Cool water as needed 1 quart[...]