Lamb Roast Sandwich with Green Pea-Dill Pesto - Icelandic Lamb

Ingredients

• 200 gr lamb steak
• salt and pepper
• Sourdough loaf or other good bread
• mixed salad leaves
• 1 tbsp olive oil
• 2 sprigs fresh thyme
• 3 cloves garlic
• 200 g frozen shelled peas, defrosted
• 1 cloves garlic, crushed
• 6 tbsp fresh dill
• 80 ml vegetable stock
• 2 tbsp fresh lemon juice
• 90 ml white wine vinegar
• 30 g sugar
• 60 ml water
• ½ cucumber deseeded and sliced
• ½ red onion, sliced thinly