Shrimp Tomato Orzo

Name: Shrimp & Tomato Orzo
Ingredients: 16 extra-large or Jumbo shrimp (about 1lb), peeled and deveined; 1 pound orzo; 4 cloves garlic, minced; 3 shallots, finely chopped; 9 scallions, thickly sliced; 3 plum tomatoes, seeded and roughly chopped; 2 cups smooth tomato sauce or puree (or a good, store-bought marinara); 5 ounces baby spinach leaves; 1/3 cup chopped fresh parsley leaves; ¾ cup crumbled feta cheese (optional)