Lemon Citrus Cod with Vegetables

Name: Lemon Citrus Cod with Vegetables
Ingredients: 1 cup freshly squeezed orange juice; 1/2 cup freshly squeezed lemon juice; 3 to 4 green onions, thinly sliced; 3 cloves garlic, chopped; 1/2 cup plus 1 tablespoon olive oil; 1/2 teaspoon red pepper flakes; Four 6-ounce pieces cod; 8 ounces string beans, trimmed; 8 ounces cremini mushrooms, thinly sliced; 1/2 sweet onion, cut in half lengthwise and then crosswise into 1/4-inch slices; 1 cup grape tomatoes, halved lengthwise; 2 to 3 tablespoons olive oil; Kosher saltand freshly ground black pepper