Grilled Party Salmon With Green Romesco

Name: Grilled Party Salmon With Green Romesco
Ingredients: Vegetable oil (for grilling); 1 2¾–3-lb. whole skin-on side salmon; 1–2 Tbsp. plus ⅓ cup extra-virgin olive oil, plus more for drizzling; Kosher salt; 1 large jalapeño, ribs and seeds removed, finely chopped; 3 garlic cloves, finely grated; 1 cup coarsely chopped parsley; ¾ cup coarsely chopped unsalted roasted almonds; ¼ cup fresh lemon juice; ½ tsp. ground cumin; Freshly ground pepper; 4 poblano chiles, halved, ribs and seeds removed; 1 lemon, halved