Rhubarb Upside Down Cake

Bahan-bahan (8 porsi)

• 3 cups fresh rhubarb (2-3 medium stalks, chopped )
• 1 ½ tablespoons all-purpose flour
• ¼ cup butter (melted)
• ½ cup brown sugar
• ¾ cup granulated sugar
• ¼ cup butter (melted)
• 1 egg
• 1 tablespoon lemon (juice + zest from lemon )
• 1 ½ cups all-purpose flour
• 2 teaspoons baking powder
• 1 pinch salt
• ⅔ cup milk