In a large bowl, gently whisk spelt flour, sugar, baking powder, baking soda, and salt.
In a separate medium bowl, mash banana. Add soy milk, lemon juice, oil, flaxseeds, and vanilla, and whisk to combine. Let sit for 10 minutes.
Heat a griddle or large non-stick pan over medium-low heat. Add liquid ingredients to the flour mixture. Using a spatula, stir to combine. Do not overmix.
Lightly grease griddle or pan with non-stick spray or a little canola oil. Pour ~¼ cup batter onto the griddle to create pancakes. Immediately sprinkle any desired toppings on pancakes, and gently press toppings down as needed. Cook until tiny bubbles appear on the surface and the edges start to firm up.
Flip and cook for ~2 more minutes. You might need to lower the heat as you cook additional batches. Hold in the oven on a warming setting or ~170°F until ready to eat. Enjoy!