Beef and Bell Pepper Pita Pizzas

Ingredients

• Topping

  • 1/2 lb (225 g) lean ground beef
  • 1 tbsp (15 ml) olive oil
  • 1 onion, thinly sliced
  • 1 red bell pepper, seeded and diced
  • 1 tbsp chili powder
  • 1/2 tsp ground cumin

• Pizzas

  • 2 tbsp (30 ml) olive oil
  • 1 garlic clove, finely chopped
  • 1/4 tsp red pepper flakes
  • 4 thick or Greek-style pitas
  • 1 cup (250 ml) high-protein 0% plain Greek yogurt, at room temperature (see note)
  • 1 lemon, zest finely grated
  • 1 tbsp (15 ml) lemon juice
  • 2 tbsp flat-leaf parsley, finely chopped