INSTRUCTIONS
1. Preheat oven to 400°F.
2. In a medium saucepan over medium heat, bring milk, water, butter, large strips of lemon and orange zest to a simmer.
3. When the mixture begins to bubble, remove saucepan from heat. Remove lemon and orange swaths and discard. While stirring your milk mixture constantly, gradually add your semolina flour. Continue to stir and add until mixture becomes thick and smooth.
4. In a large mixing bowl with a standup mixer and beater attachment or electric mixer, mix ricotta cheese, eggs, granulated sugar, orange zest, lemon zest, pure vanilla extract, and salt on low-medium speed.
5. Gradually add your warm semolina mixture into your ricotta mixture. Mix well until you form a creamy batter. Your batter may be a bit lumpy, that's okay!
6. Grease a 9-inch springform pan with butter and flour. Transfer your batter into your springform pan.
7. Place springform pan in oven and immediately lower oven temperature to 365°F. Bake for 1 hour or until toothpick comes out clean, cake is firm, and top is a golden brown colour.
8. Allow cake to cool completely. Dust with powdered sugar and serve.