Easy scandi crispbread

Ingredients

• 1 x 7g sachet of yeast
• olive oil
• 200g mixed flour (equal parts spelt, rye, wholemeal, bran), plus extra for dusting
• 1 tablespoon porridge oats
• ½ teaspoon fennel seeds
• 2 x 80g jarred pickled herring fillets, from sustainable sources, with pickling liquor
• 1 small red onion
• 1 handful of raw crunchy veg, such as mixed-colour beets, carrots, radishes
• 4 sprigs of fresh dill
• 2 tablespoons white wine vinegar
• 2 tablespoons natural yoghurt
• 1 punnet of cress
• cayenne pepper