Shrimp Soup With Orzo

Ingredients

• 2 tablespoons olive oil
• 1 large onion (finely chopped)
• 3 carrots (diced)
• 3 celery stalks (diced)
• 2 garlic cloves (minced)
• 1 (14-ounce) can diced tomatoes
• 2 teaspoons dried oregano
• 1 teaspoon salt
• ½ teaspoon black pepper
• 4 cups low-sodium vegetable broth
• ½ cup orzo pasta
• 1 pound raw small shrimp (peeled, deveined, tails off)
• ¼ cup fresh dill (chopped, plus more for garnish)
• 1 tablespoon red wine vinegar