On a large platter, layer the pork, tomato, mozzarella, and zucchini slices in a circle, oval, or rectangle. Place the arugula at the center, topping with extra tomatoes if you have them. Sprinkle salad with a little salt, pepper, and crushed red pepper, if using. Spoon Chimichurri Sauce lightly and evenly over all the ingredients. Serve at room temperature, warm, or chilled. Store leftovers tightly covered for a day in the fridge.