Baked Shrimp in Tomato Feta Sauce

1 tbsp. olive oil
1 med. onion, chopped
2 cloves garlic, minced
1 (28 oz.) can diced tomatoes, with juices
1/4 c. minced fresh parsley
1 tbsp. minced fresh dill or 1 tsp. dried dill
1 to 1 1/4 lb. med. raw shrimp, peeled and deveined (thawed if frozen)
Salt and pepper, to taste
3 oz. feta cheese (about 2/3 c., crumbled)

Preheat the oven to 425°F. Heat oil in a large skillet over medium-high heat. Add onions and cook until soft, 3 to 5 minutes. Add garlic and cook until fragrant, about 30 seconds more. Add tomatoes and bring to a simmer. Reduce heat and let sauce simmer for 5 to 10 minutes, until juices thicken a bit. Remove sauce from heat, and stir in herbs, shrimp, feta cheese, and salt and pepper to taste.

Transfer to a baking dish, if desired, and bake until shrimp are cooked through, about 10 to 12 minutes. Serve immediately.