Baked Shrimp with Tomatoes and Feta

INGREDIENTS

• 2 tablespoons olive oil
• 4 thinly sliced scallions
• 4 garlic cloves, thinly sliced
• 2 teaspoons dried oregano
• 2 pints cherry tomatoes, halved
• Coarse salt and ground pepper
• 1 1/2 pounds peeled and deveined large frozen shrimp, thawed, tails removed
• 2 tablespoons chopped fresh fresh mint, plus more for garnish
• 4 ounces feta cheese