Baked Shrimp and Orzo with Feta and Tomatoes

Name: Baked Shrimp and Orzo with Feta and Tomatoes
Ingredients: 1 pound extra-large shrimp (21 to 25 per pound), peeled, deveined, and tails removed; Salt and pepper; 1 tablespoon extra-virgin olive oil; 1 red onion , chopped fine; 1 red bell pepper , stemmed, seeded, and cut into ½-inch pieces; 4 garlic cloves , minced; 2 teaspoons minced fresh oregano or ½ teaspoon dried; 2 cups (12 ounces) orzo; Pinch saffron threads , crumbled; 3 cups chicken broth; 1 (14.5-ounce) can diced tomatoes , drained with juice reserved; ½ cup frozen peas; 3 ounces feta cheese , crumbled (¾ cup); 2 scallions , sliced thin; Lemon wedges