I honestly just threw it together, let me write down what I did:

Ingredients

• 450g Dinkel flour
• 50g wheat flour
• 400ml water
• 1 packet dry yeast
• 2 teaspoons salt
• 1 teaspoon onion powder
• 3-4 tablespoons of fried onions
• A bit of milk

Preparation

• Mix the wheat flour with 250ml of the water and cook it in a pot til it forms a thick paste. Let that cool down
• Mix the dinkel flour with the remaining 150ml of water, the yeast, salt and onion powder
• While mixing slowly add the roux to the mix
• Knead until you get a well developed dough, roughly ten to fifteen minutes
• Put in the fried onions and knead until they are well dispersed
• Cover and let rest at a warm place until doubled, roughly one hour
• Put into a well floured Dutch oven, brush with milk, score it and put the lid on
• Put the durch oven into the cold oven at 180°C without convection
• Bake for 50 minutes
• Remove the lid and let it bake for another 10 minutes until the top is nice and brown