To make the romesco sauce cut up the red pepper into quarters discarding the seeds
brush the pepper in olive oil and griddle them on a grill or griddle pan
Keep flipping every minute or so until cooked through.
Allow to cool and blend with the rest of the ingredients.
Finely chop the onion, add to a pot with some olive oil fry for 5 minutes
Add the lentils and water, season with salt and pepper and simmer for 20 minutes until cooked through.
Mix through the chilli flakes, lemon and spring onions.
Slice the cabbage and brush with olive oil, season with salt and grill for 5 minutes each side until soft and charred.
Place the lentils down on a serving tray. Spread the romesco sauce on top followed by the cabbage and drizzle over the sriracha and parsley.