Mediterranean Pizzas

Ingredients

• 2 tbsp olive oil
• 2 None onions, finely chopped
• 1 lb ground beef
• 2 tbsp tomato puree
• 1 (13.5 oz) can chopped tomatoes
• 1/4 cup pine nuts, toasted
• 1/4 cup fresh mint leaves, chopped, plus extra to garnish
• 1 tbsp balsamic vinegar
• 1 tsp honey
• 1/2 tsp ground cinnamon
• 1/2 tsp ground cumin
• None None flour, for dusting
• 4 None ready-made pizza bases
• None None Greek yogurt, to serve