Buckwheat Pizza With Mushrooms And Bone Marrow

Ingredients

• 1/2 cup tomato passata (puréed tomatoes)
• 1 clove garlic
• 10 1/2 ounces button mushrooms
• Himalayan salt and freshly ground black pepper
• 1 pound 2 ounces grass-fed beef thigh bones filled with marrow (Ask your butcher for these)
• 1/4 cup salsa verde
• 2 large handfuls baby beetroot or rocket leaves
• 1 cup buckwheat flour
• 1 1/2 tablespoons arrowroot
• 1/4 teaspoon baking soda
• 1/4 teaspoon Himalayan salt
• Scant 1/2 cup water
• 1 tablespoon olive oil
• 1 teaspoon apple cider vinegar (unpasteurized)