In large bowl, whisk together the eggs and sugar until lighter in color and foamy. Add the melted butter, milk, heavy cream and vanilla extract, and whisk to combine. Set aside.
In a separate bowl, sift together the flour, salt and baking powder. Set aside.
Peel the apples, core them and pass them through a mandolin to get thin slices. The apple slices should be fairly thin but not paper thin – you don’t want them to break when you fold them into the batter.
Pre-heat your oven to 350°F (180°C) with a rack in the middle. Line a 9”x 5” (22,8cm x 12,7cm) loaf pan with parchment paper (bottom and edges).
Whisk the dry ingredients into the egg mixture. The batter should be on the thinner side. Switch to a spatula or large spoon and fold in the apple slices until they’re all coated in the batter. It will feel like a lot of apples for a little batter – that is normal.
Gently dump the batter with the apples into the prepared loaf pan. Go a little at a time, flattening any apples slices that stick up. Lightly press the apples down with a fork or spoon between each addition.
Bake for 45-50 minutes, until the top starts to golden. Transfer to a cooling rack, and let cool for at least 30 minutes before transferring onto a serving plate. Enjoy warm or cool. Use a serrated knife for cutting clean slices.