1.Heat oil in large saucepan; cook onion, garlic, seeds and spices, stirring, until onion softens.
2.Add barley; cook, stirring, 1 minute. Add stock and the water, bring to a boil; reduce heat, simmer, covered, 20 minutes.
3.Stir in burghul; cook, covered, about 10 minutes or until burghul and barley are tender.
4.Meanwhile, quarter capsicums, remove and discard seeds and membranes. Roast under grill or in very hot oven, skin-side up, until skin blisters and blackens. Cover capsicum pieces with plastic or paper for 5 minutes; peel away skin, slice thinly.
5.Heat butter in medium frying pan; cook fennel, stirring, until tender.
6.Just before serving, toss capsicum and fennel into barley mixture. Top with yogurt.
Pearl barley is barley with the outer husk removed. It is available from major supermarkets and health food stores. Regular barley can be used instead of the pearl barley.