Crunchy oat crumble spooned over Greek yogurt — it's like a deconstructed parfait that delivers protein and crunch in every bite.
Preheat the oven to 350°F (175°C) and line a baking sheet with parchment paper for even heat distribution.
In a bowl, combine oats, crushed walnuts, cinnamon, salt, and mix well; then stir in egg white, honey, and vanilla extract until mixture forms cohesive clumps.
Spread mixture evenly onto the prepared sheet, pressing lightly for uniform thickness and crisp texture.
Bake for 16–18 minutes, stirring halfway through to promote even browning and prevent burning around the edges.
Let crumble cool fully to enhance crunch; spoon over chilled Greek yogurt just before serving for maximum texture contrast.