Skillet Orzo with Tuna

Name: Skillet Orzo with Tuna
Ingredients: 2 tablespoons extra-virgin olive oil; 1 clove garlic, thinly sliced; 4 scallions, thinly sliced; 1 14-ounce can no-salt-added diced tomatoes; 1/4 teaspoon dried oregano; 1 1/2 cups orzo; Kosher salt and freshly ground pepper; 1 14-ounce can cannellini beans, drained and rinsed; 1 small green bell pepper, thinly sliced; 1 5-ounce can solid white tuna packed in water, drained; Juice of 1 lemon; 2 tablespoons chopped fresh parsley