Heat oven to 275°F. Combine the oats, cashews, applesauce, sesame seeds, brown sugar, butter, ginger, and salt in a large bowl. Transfer to a rimmed baking sheet. Bake, tossing twice, until golden brown, 55 to 60 minutes; cool. Stir in the pineapple. Store at room temperature for up to 2 days (or freeze for up to 2 weeks). Serve with the yogurt and apple.