Pour 500 ml milk and 500 ml sparkling mineral water into a food processor
Gradually add 900 g flour while processing, starting slowly then increasing speed, until the mixture reaches a pudding-like consistency and holds together when pressed
Divide the batter into 4 equal portions using a ladle and refrigerate 3 portions
Heat 250 g clarified butter in a 28-30 cm cast iron pan over medium-high heat, covered with a lid
Wait 2-3 minutes until the butter is hot and small bubbles form on a wooden spoon handle, then reduce the heat to medium
Separate 2 eggs into yolks and whites, keeping them in separate bowls
Stir the egg yolks and chopped almonds into one batter portion
Beat the egg whites with a pinch of salt for 3-4 minutes until stiff peaks form
Gently fold the beaten egg whites into the batter portion with the yolks and almonds
Pour the batter portion into the hot pan and sprinkle sugar over the top
Cover the pan with the lid (this is essential for proper caramelization) and cook for 3-4 minutes until the bottom is golden brown
Using 2 forks or a spatula, tear the cooked batter in the middle and divide it into 2-3 pieces; flip each piece and sprinkle sugar over the top
Cover the pan again and cook for 2-3 minutes until the pieces are golden brown
Repeat the tearing, dividing, flipping, and sugaring 1-2 more times until all pieces are caramelized on multiple sides
Remove the cooked pieces from the pan using a slotted spoon and drain on paper towels
Repeat steps 6-15 with each of the remaining 3 batter portions