In a large bowl, combine the oat milk, water, salt and yeast.
Mix in the flours and stir until all the ingredients are thoroughly combined.
Lightly cover the bowl with a clean dishcloth. Place the bowl on a kitchen counter where it's warm, and let the dough rise for 2 hours. The dough should double in size.
Preheat the oven to 425°F. Spray or oil a standard (9 x 5 x 2 ½-inch) loaf pan.
Sprinkle a little flour over the surface of the dough to keep it from sticking to your hands.
Shape the dough into a football-shaped oval.
Place the dough in the prepared loaf pan. With a serrated knife, slice the top of the bread on the diagonal two or three times.
Bake the bread for 35 to 40 minutes, or until the loaf sounds hollow when you tap the bottom.
Let the loaf cool completely on a cooling rack before slicing it.
Notes
Nutrition: please note that the nutritional information is an estimate per serving provided for informational purposes only (calculated by software) and accuracy is not guaranteed. Consult with your healthcare provider or a registered dietitian if you need precise nutrition calculations for health reasons.