Make a slice in each croissant, taking care not to cut all the way through. Set aside.
In a bowl, whisk together eggs, brown sugar, cinnamon and evaporated milk.
Place a tablespoon of strawberry pie filling in each croissant.
Heat a grill pan over medium heat and spray with non-stick spray. Dip each croissant in egg mixture, taking care to soak up as much mixture as possible.
Place croissants on hot grill pan, cook each side 2-3 minutes until golden brown or cooked through. Repeat with remaining croissants.
Drizzle warm croissants with sweetened condensed milk. Serve immediately.