Seared Ahi Tuna with Chimichurri Sauce recipes

Name: Seared Ahi Tuna with Chimichurri Sauce recipes
Ingredients: 1/3 cup plus 2 tablespoons extra-virgin olive oil; 1/2 cup chopped cilantro; 1/2 small red onion, minced; 1 jalapeño, minced; 3 tablespoons sherry vinegar; 2 tablespoons chopped basil; 2 tablespoons chopped parsley; 3 garlic cloves, minced; 1 teaspoon chopped thyme; 1 teaspoon red pepper flakes; 1/8 teaspoon cayenne pepper; kosher salt; ground black pepper; 1 1-lb sushi-grade tuna steak; 6 oz baby arugula; 2 avocados, pitted, peeled and sliced