Lamb souvlaki wraps

Ingredients

• 2 tablespoons lemon juice
• 2 tablespoons chopped fresh mint, plus extra leaves, to serve
• 1 clove garlic, crushed
• 7oz lean lamb leg steaks, fat trimmed
• 1 small red capsicum, deseeded, sliced
• ¹⁄³ cup low-fat plain yoghurt
• 2 gluten-free wraps
• 1 small gem lettuce, leaves separated
• 4 small radishes, thinly sliced
• 1 Lebanese cucumber, cut into ribbons