Grilled Cauliflower Steak with Israeli Couscous and Olives

Name: Grilled Cauliflower Steak with Israeli Couscous and Olives
Ingredients: 1/3 cup sliced almonds; 1 large head cauliflower; 2 tablespoons harissa; 7 tablespoons extra-virgin olive oil, plus more for drizzling; Kosher salt; 2 cloves garlic, minced; 2 teaspoons minced ginger; 2 cups Israeli couscous; 1/4 cup golden raisins; Juice of 2 lemons and zest of 1 lemon, plus more for serving; 2/3 cup crumbled feta; 1/3 cup roughly chopped fresh parsley; Freshly ground black pepper; 12 large green olives, smashed