Greek Beef Wraps

INGREDIENTS

• 1 pound ground round
• 1 small red onion, chopped
• 1 teaspoon Greek seasoning
• 1/2 teaspoon pepper
• 1/2 teaspoon salt, divided
• 1 cucumber, peeled, seeded, and grated
• 1 (8-oz.) container sour cream
• 1 garlic clove, minced
• 1 tablespoon chopped fresh dill weed
• 6 garden-spinach flatbread wraps
• 3 plum tomatoes, finely chopped
• 1 (4-oz.) package crumbled feta cheese