Using a food processor, finely chop the walnuts. Set aside.
Using the same food processor, blend the red bell pepper into a smooth paste.
Mix the walnuts, red bell pepper paste, onion, chili powder, breadcrumbs, salt, cumin powder, pomegranate molasses, and olive oil.
Place the mix in the food processor and gently blend one last time.
Pour the dip onto a serving plate. Garnish with walnut halves.
Serve with pita bread.