Cebiche

Yield:	6 Servings
Categories:	Seafood, Mexican, Spices

1	lb	Skinned fillets of mackerel or sierra
		Juice of 6 or 7 large limes (1 1/4 to 1 1/2 cups)
2	md	Tomatoes
3		Or 4 canned chiles serranos en escabeche
1/4	c	Olive oil
1/2	ts	Oregano
1/2	ts	Salt (or to taste)
		Pepper