Preheat oven to 450°F. Place the green beans, tomatoes, chopped garlic, olives, and shrimp in a large bowl. Drizzle olive oil and sprinkle with half the Greek seasoning and half the fresh dill (preferably the stems). Toss until well coated. Pour onto a baking sheet. Sprinkle with additional Greek seasoning and dried oregano. Bake for 20 minutes. Remove from the oven and sprinkle on feta. Serve immediately.