Lamb Burgers With Feta & Black Olives

Ingredients

• 800 g ground lamb (1.5-1.7 lbs. mince, good quality)
• 1 medium onion (finely diced)
• 2 cloves garlic (grated or finely diced)
• 2 tablespoons tomato purée (or paste)
• 2/3 teaspoon sea salt
• 1/2 teaspoon black pepper
• 1/2 cup feta cheese (goat's, sheep's or regular milk, roughly crumbled)
• 20 black olives (without the pits such as Spanish olives, roughly sliced or diced)
• 1-2 tablespoons olive oil for cooking
• 4 medium zucchinis (sliced into thin strips)
• Sea salt
• 4 cups cos lettuce (or iceberg, shredded)
• 1/4 cup sun-dried tomatoes (or semi-dried tomatoes, diced)
• A dill pickle (sliced (or a few gherkins))
• Juice of 1/3 lemon
• 1/4 cup sauerkraut (optional)