Wholegrain tart with leeks and feta cheese - Off a diet

Ingredients

• 3 cups whole wheat flour
• ½ tsp baking soda
• 1 cup Greek yogurt, (2% fat)
• 1 large egg
• ½ cup olive oil, (extra virgin)
• 2 tbsp grated parmezan
• 2 tbsp olive oil, (extra virgin)
• 1 tbsp butter
• 1 spring onion, (chopped)
• 1 garlic clove, (minced)
• 3 leeks, (light green part only, chopped)
• 1 tsp dried oregano
• ½ tsp dried thyme
• 1½ cup vegetable stock or water
• 1 cup Greek feta cheese, (crumbled)
• ½ cup regato cheese, (coarsely grated)