Sheet Pan Roasted Lemon Garlic Butter Salmon with Feta and Olives

Name: Sheet Pan Roasted Lemon Garlic Butter Salmon with Feta and Olives
Prep time: 15 min
Cook time: 40 min
Total time: 55 min
Cuisine: American, Mediterranean
Ingredients: 1 pound baby potatoes, halved; 1/4 cup + 3 tablespoons extra virgin olive oil; kosher salt and black pepper; 6 cloves garlic, 2 finely chopped, plus 4 whole cloves; 2 lemons, 1 halved and 1 sliced; 4 (5-6 ounce) salmon fillets; 1/4 cup chopped fresh oregano; 1 teaspoon smoked paprika; 1 pinch red pepper flakes; 4 tablespoons salted butter, sliced into 6 pieces; 1/2 cup fresh parsley, chopped; 1/2 cup fresh basil, chopped; 1/2 cup green olives, roughly chopped; 2 tablespoons champagne vinegar; 1 tablespoon fish sauce ((optional)); 4 ounces feta cheese, broken into chunks; baby arugula, for serving