Fish Broth (Brodo Di Pesce)

Yield:	2 Servings
Categories:	Italian, Seafood, Soups

2	md	Onions
2	md	Leeks
2	tb	Olive oil
1	lb	Heads and bones from red snapper, rockfish, cod,
		Flounder, porgy, or sea bass
1	tb	Tomato paste
		Salt to taste
2	qt	Boiling water
1		Celery stalk
2		Sprigs fresh thyme (or 1 tsp dried)