This is from the blog Tastefood.

Serves 4

1 tablespoon extra-virgin olive oil
6 oz. (180 g.) chorizo sausage, cut in 1/4″ slices
1 medium onion, chopped
1 1/2 cups whole milk
1 cup heavy cream
1 cup shucked oysters (about 12), liquor drained and reserved
3 cups spinach leaves, washed
1 teaspoon salt, or to taste
1 teaspoon freshly ground black pepper

Heat olive oil in a large saucepan over medium heat. Add chorizo. Cook, stirring, until golden brown, 3-4 minutes. Transfer chorizo to a plate lined with a paper towel. Pour off all but 1 tablespoon fat from saucepan. Add onion to saucepan and saute over medium heat until translucent, about 3 minutes. Add milk, cream and reserved oyster liquor to the onions. Bring to a boil and reduce heat to a simmer. Add spinach and cook briefly until wilted but still bright green. Add oysters and simmer until cooked through, 2-3 minutes. Add salt and pepper to taste. Serve immediately in warm bowls.