Make these whole grain gluten-free muffins with any berries you choose. I like a mix, but it's up to you. These can easily be made vegan by swapping flax eggs for the eggs.
Preheat oven to 400° F. Grease a muffin tin or line it with cupcake liners.
In a medium bowl, whisk together the non-dairy milk, vinegar, maple syrup, oil, and eggs until well combined.
In a large bowl, whisk together the flours, baking powder, baking soda, cardamon, ginger, and salt. Mix in the berries, tossing to coat the fruit lightly.
Pour the wet ingredients into the dry and stir gently until just combined.
Distribute the batter evenly into the muffin tins and sprinkle each muffin with oats and brown sugar. Place in the oven and bake for 20-25 minutes, until a tester comes out clean. Remove tin from oven and let muffins cool in the pan for about 10 minutes, then turn the muffins out onto a wire rack to cool completely.
Serve room temperature or slightly warm, with a bit of margarine or butter. Muffins can be stored in an air-tight container at room temperature for 3 days.