Soak the wheat, spelt, millet, lentils, kidney beans, and black beans in water for 12 to 24 hours until they soften or begin to sprout. Drain well.
If using whole grains, blend or grind them into a thick paste or coarse flour after soaking.
In a large bowl, mix warm water, honey, olive oil, and yeast. Let it rest for 5 to 10 minutes until the yeast becomes foamy.
Add the soaked or ground grains, flours, oat bran, and salt to the bowl. Mix well until a thick, sticky dough forms.
Cover the bowl with a clean cloth and place it in a warm spot for about 45 minutes to 1 hour, until the dough increases in size.
Lightly grease a loaf pan and pour the dough into it. Smooth the top gently with a wet spoon.
Sprinkle sesame seeds or flax seeds on top if using.
Let the dough rest in the pan for another 15 to 20 minutes.
Preheat the oven to 175°C (350°F).
Bake the bread for 45 to 50 minutes until the top is golden brown and the loaf sounds hollow when tapped.
Remove the bread from the pan and place it on a wire rack.
Allow the bread to cool completely before slicing for the best texture.