Greek Kofta Kebabs

Kofta kebab:

• 500g/ 1 lb lamb mince (or beef, or 50/50 beef/lamb, Note 1)
• 3 large garlic cloves , crushed using garlic press or finely grated
• 2 tsp paprika (regular/sweet, not smoked)
• 2 tsp mustard powder
• 4 1/2 tsp dried oregano
• 1 1/2 tsp curry powder , not spicy, any brand fine (Kalimera secret ingredient! Note 2)
• 3/4 tsp cooking salt / kosher salt
• 1/4 tsp black pepper

For cooking:

• 1 tbsp olive oil
• 8 skewers , optional (I use 18cm/7.5")

Secret Sauce (Note 3):

• 3/4 cup PLAIN yogurt , preferably Greek (full-fat best)
• 2 tbsp mayonnaise , preferably whole-egg
• 2 tbsp extra virgin olive oil
• 1 tbsp American yellow mustard (ie the bright yellow American stuff!)
• 1 1/2 tsp garlic powder
• 1 1/2 tsp paprika (sweet/regular, not smoked or spicy)
• 1/2 tsp cooking salt / kosher salt

Serving:

• 4 Greek pita bread , pockets or flatbreads, warmed (TIPS - Note 4!)
• 2 tomatoes , halved and sliced
• 1/2 red onion , finely sliced or chopped
• iceberg lettuce , finely sliced (or other leafy greens)