I'm not sure if you can find dry shrimp outside Mexico, but here is very common. So I tought I'll just share a quick recipe.
Dry Shrimp Soup
It is nutritious, cheap and delicious.
a bit of onion
3 large garlic cloves or 7 small
ground white pepper
a pound of tomatoes
a pinch of thyme
a pinch of ground chile morita in olive oil (if you want it spicy)
Chop all the ingredients above and fry over low heat with olive oil.
Blend, return to pot.
a quarter of dried shrimp (they are only about 8 large ones)
3 large or 5 medium nopales
a bunch of spinach
Chop and add to the tomato sauce.
Add water to fill the pot.
Raise the heat to high simmer.
Serve with chopped avocado.