1.Preheat oven to 200°C (180°C fan); oil oven trays.
2.Heat oil in a large frying pan over high heat, add lamb; cook, stirring, until lamb changes colour. Add spices; cook, stirring, for 2 minutes or until fragrant. Remove from heat. Cool mixture slightly.
3.Sprinkle pizza cheese over pizza bases; top with half the spinach, then all the lamb mixture and fetta.
4.Place pizzas on oven trays; bake for 20 minutes or until golden and cheese is melted. Just before serving, top with remaining spinach and yoghurt, and a squeeze with lemon.
Make this as individual pizzas, if you like. Simply use 4 store-bought small gluten-free pizza bases. If you have a gluten allergy, make sure the ground spices you buy are gluten free as some brands may contain wheat-based anti-caking agents or fillers. Swap lamb for beef or chicken mince. If the pizza base is not crisping as much as you would like, place the cooked pizzas on an oiled, heated grill pan (or barbecue plate) for a few minutes.