Grilled Garlic Shrimp with Israeli Couscous

Name: Grilled Garlic Shrimp with Israeli Couscous
Ingredients: 1 pound large peeled and deveined shrimp, tails removed; 6 tablespoons extra-virgin olive oil, plus more for oiling the grill grates; 2 teaspoons dried oregano; 1/4 teaspoon crushed red pepper flakes; 3 large cloves garlic, grated; 3 lemons; 2 cups Israeli couscous; 1/4 cup golden raisins; Kosher salt and freshly ground black pepper; 2/3 cup crumbled feta; 1/3 cup pitted Kalamata olives, halved; 1/3 cup roughly chopped fresh parsley