Heat a tablespoon of EVOO, 1 turn of pan, in a skillet over medium-high heat. Add chorizo and render fat, 2 minutes. Remove chorizo with a slotted spoon to a plate then add remaining EVOO, 2 tablespoons, and the shrimp. Season with salt and pepper, toss 2 minutes then add garlic, lemon zest and chili. Toss 2 minutes more, add sherry, toss to deglaze pan then add lemon juice and toss again. Add chorizo back to the pan and toss chorizo and shrimp with parsley to serve.