Preheat the oven to 350 degrees F. Spray the wells of a 12-cup shallow muffin tin with nonstick spray; set aside.
In a large bowl, stir the oats, pecans, sunflower seeds, honey, olive oil, 2 tablespoons of the maple syrup and a pinch of salt until completely combined. Press 2 heaping tablespoons in each well of the prepared muffin tin, pressing to go up the sides (if you have additional granola, use an additional muffin tin). Bake until golden and crisp, 15 to 18 minutes. Let cool completely, then remove the granola cups from the muffin tin.
In a medium bowl, whisk to combine the yogurt and remaining 2 tablespoons maple syrup. Fill each granola cup with about 2 tablespoons yogurt and top with the blueberries and a sprig of mint to serve.