Heat oven to 350° F. Combine the oats, pistachios, maple syrup, poppy seeds, sesame seeds, vanilla, ginger, and the salt in a large bowl. Transfer to 2 rimmed baking sheets. Bake, stirring and rotating the pans once, until golden brown, 18 to 24 minutes.
Serve the muesli with milk, almond milk, or plain yogurt, topped with sliced apple and fig.