Set up a steamer (bamboo or rice cooker) with simmering water.

Line the steamer basket with parchment paper.

Combine strawberries and chopped orange with 1 tbsp of orange vanilla sugar.

Let macerate.

In a separate bowl, beat eggs, sugar, and soy milk until well combined.

In another bowl, whisk together almond flour and baking soda.

Gradually add the dry ingredients to the wet ingredients, mixing until just combined.

Gently fold in the macerated fruit.

Pour the batter into the prepared pan.

Smooth the batter to the edges of the pan.

Tap the pan on the counter to release any large air bubbles.

Arrange orange slices on top of the batter.

Place the pan in the steamer.

Cover the steamer with a kitchen towel and then place the lid on top.

Steam for about 30 minutes, or until a toothpick inserted into the center comes out clean.

Remove from steamer and let cool before serving.