Well, I lied a little. You have to blanch the tomatoes, to be able to peel them, but there's nothing to it. You just immerse them in boiling water for 30 seconds. I do it one by one in an ibrik. Next you let them cool for a while, and then you can easily peel them.
For this recipe you need frozen precooked deveined tail-on shrimp (with the shell peeled off and the vein that goes along the back removed), tomatoes, oranges, garlic, salt and pepper, and a little olive oil. Also some parsley at the end, when you serve it. That’s all. You may also use some white wine, but you don’t have to. Water works just fine.