Baked Apples Filled with Granola Streusel

Ingredients (11)

For the granola streusel:

• 5 tablespoons unsalted butter (a scant 2/3 stick), melted
• 1 teaspoon vanilla extract
• 1/3 cup all-purpose flour
• 1/3 cup old-fashioned oats
• 1/3 cup chopped toasted almonds
• 1/3 cup dark brown sugar
• Pinch kosher salt

For the apples:

• 4 to 6 sweet-tart baking apples, peeled and cored but left whole
• 1 cup light brown sugar
• 3/4 cup water
• Kosher salt