- Preheat oven to 350 degrees and lightly grease a 12-cup muffin tin with coconut oil or nonstick spray.  
- In a small bowl, combine oat milk and apple cider vinegar. Let sit while prepping the dry ingredients. 
- In a large bowl, combine oat flour, white whole wheat flour, oats, cardamom, baking powder, baking soda, and salt. 
- Add the eggs, maple syrup, and olive oil to the milk and apple cider vinegar mixture. Whisk to combine and then add to the dry ingredients. Stir until just combined. 
- Mix in the strawberries until just combined and then use a medium ice-cream scooper to portion the batter into the muffin tins. Top with the additional sliced strawberries. Sprinkle with oats and pearl sugar if desired.  
- Bake for 18-22 minutes, or until a toothpick inserted into the middle of the muffins comes out clean. Let cool for 5 minutes and then use a mini spatula to remove each muffin and transfer to a wire rack. Enjoy!