Meanwhile, heat medium skillet over medium-high heat. Place amaranth or millet in skillet and gently shake skillet back and forth over heat until grains begin to pop. Transfer grains to small bowl. Add oatmeal to skillet and cook, stirring constantly, just until toasted. Transfer oats to bowl. Add butter or coconut oil, 1 Tbsp maple syrup, and coconut sugar to skillet. Cook until bubbly, then add popped amaranth, oats, pecans, pumpkin pie spice, chili powder, and cayenne. Cook just until mixture begins to turn light golden brown and starts to clump together. Transfer granola to piece of parchment and allow to cool.