Maple Apple Streusel Cake

Ingredients

• 3/4 cup cooking oil, or melted, unsalted butter
• 3/4 cup pure maple syrup (preferably amber syrup for its rich flavor)
• 3/4 cup sour cream
• 3 large eggs
• 1 1/2 tsp vanilla extract
• 1 3/4 cup all-purpose flour
• 1 1/2 tsp baking powder
• 1 1/2 tsp baking soda
• 1/4 tsp salt
• 3 cups peeled, diced apples, divided
• 1/3 cup all-purpose flour
• 1/4 cup butter, very cold
• 1/2 tsp ground cinnamon
• 1/4 tsp ground nutmeg
• 1/3 cup sliced almonds
• 2 Tbsp pure maple syrup (preferably amber syrup for its rich flavor)
• 1 cup heavy cream, well-chilled
• 1/3 cup pure maple syrup (preferably amber syrup for its rich flavor)