Homemade Strawberry Nutri Grain Bars

Bahan-bahan (10 porsi)

• 1 cup Whole Wheat Flour
• 3/4 cup Old Fashioned Oats
• 1/4 teaspoon cinnamon
• 1/4 teaspoon kosher salt
• 6 tablespoons cold unsalted butter, grated
• 2 egg yolks
• 2 tablespoons plain greek yogurt
• 2 tablespoons honey
• 2 teaspoons vanilla
• 1 cup strawberry jam, homemade or store-bought
• buttermilk, for brushing