Marinated Grilled Swordfish with Olive Chimichurri

Name: Marinated Grilled Swordfish with Olive Chimichurri
Ingredients: 2- 1 to 1 1/2 inch swordfish steaks; 2 tsp Dijon mustard; 1 tbsp lemon juice; 2 tsp olive oil; 2 cloves garlic (minced); 1 tsp chopped parsley; 1/4 tsp kosher salt; 1/8 tsp ground black Pepper; 1 whole lemon (cut in half); 8 pitted green olives (crushed, then roughly chopped); 1 clove garlic (minced); 1 Fresno pepper (seeds removed, minced); 2 tbsp chopped parsley; 2 tbsp chopped cilantro; 2 tsp red wine vinegar; 1/2 tsp lemon zest ( from marinade lemon); 1/4 cup olive oil; ¼ tsp kosher salt; ⅛ tsp ground black pepper