Orange Upside-Down Cake

Ingredients

• ¾ cup La Tourangelle Extra Virgin Olive Oil
• ¾ cup buttermilk
• 2 cups sugar
• 3 eggs, at room temperature
• 1 tbsp orange zest
• 2 tsp pure vanilla extract
• 2 cups all-purpose flour
• 1 tsp baking powder
• ½ tsp baking soda
• ½ tsp cinnamon
• ¼ tsp cardamom
• 1 tsp salt
• 3 oranges, thinly sliced (~1/8-1/4 inch thick)
• ½ cup brown sugar, packed
• 3 tbsp butter
• 4 tbsp water
• Splash of vanilla extract
• Pinch of salt