In large mixing bowl, add oil, eggs, whole milk, lemon juice, and lemon zest. Cream for 2 minutes. In large bowl, add sugar, flour, baking powder, baking soda, and salt. Stir into egg mixture and fold. Spray cupcake liners with nonstick cooking spray. Place batter into cupcake lined baking pan. Bake for 18-24 minutes or until toothpick comes out clean. Cool.
Optional: Once cupcakes cook, fill eat center with lemon curd.
For frosting:
In large bowl, cream together ricotta cheese and cream cheese for 4-5 minutes until light and fluffy, scraping sides of bowl often. Add powdered sugar and lemon juice and cream together. Spread on top of cooled cupcakes and sprinkle lemon zest on top.