Add the silken tofu, plant-based milk, oat flour, arrowroot powder and spices to a small blender (or use a stick blender and a high mixing bowl). Blend until smooth.
Heat a non-stick pan with your preferred cooking oil. Wipe off excess oil with a paper towel.
When hot, pour the omelette batter into the pan. Spread it out until it's relatively thin. Let it cook for 4 minutes on one side.
Run a spatula along the edges and underneath the omelette when it no longer looks wet. Carefully lift and flip it.
Let it cook over medium heat for another 2-3 minutes on the other side.
Serve it with sauteed vegetables and hummus if desired.