Greek ‘Feta-Melt’ Burgers

Ingredients

• 750 g minced beef (non-lean)
• 1/4 cup crumbled feta cheese
• 1 small red onion, finely chopped
• 2 garlic cloves, crushed
• 1/2 tsp origanum
• 1 egg
• Salt
• freshly ground black pepper
• 2 fresh bagels, sliced
• Olive oil, for frying
• 4 fresh olive ciabatta rolls, sliced
• 2 cups plain Greek yogurt
• 1/4 large cucumber (+-10cm), grated
• 1 garlic clove, crushed
• Juice of 1/2 a lemon
• Olive oil, for drizzling
• 1 whole cos lettuce, washed and leaves torn
• 2 large tomatoes, sliced
• 1/4 cup crumbled feta cheese, crumbled