Preheat oven to 350°F (175°C). Line a muffin tin with paper liners.
In a large bowl, mix flour, sugar, poppy seeds, baking powder, baking soda, and salt.
In another bowl, whisk together melted butter, milk, eggs, lemon zest, and lemon juice.
Combine wet and dry ingredients until just mixed.
Pour batter into muffin tin and bake for 20-25 minutes or until a toothpick comes out clean.
Let muffins cool, then crumble them into a trifle dish.
Layer with whipped cream and lemon curd.