Blackberry Cheesecake Cups

INGREDIENTS

• 1 cup graham cracker crumbs
• 1/2 cup sugar
• 3 large egg whites
• 2 8-oz. packages reduced-fat cream cheese, at room temperature
• 2 tablespoons all-purpose flour
• 1 teaspoon grated lemon zest
• 1/2 cup low-fat plain Greek yogurt
• 1 tablespoon vanilla extract
• 1 large egg
• 1 pint blackberries
• 1/2 cup seedless raspberry preserves