Bring a full kettle to the boil. Bring a small pot of salted water to the boil. Preheat BBQ hotplate to medium heat (if using).
Pat chicken dry and cut into steaks. To do this, place your hand flat on top of chicken breast and use a knife to slice through horizontally to make two thin steaks. Toss chicken in a shallow bowl with seed mix and salt to coat. Season with pepper.
Add bulgur, bulgur spices and a pinch of salt to a heat-proof, bowl and cover with boiling water. Cover and leave to soak for 15-18 minutes until grains are tender. Drain well through a sieve.
Heat a drizzle of oil in a large fry-pan on medium-high heat and cook chicken for 2-3 minutes each side, until cooked through. Set aside, uncovered, for about 5 minutes to rest.
While chicken cooks, add onion to a large bowl along with vinegar, lemon zest and juice, olive oil and mustard and whisk to combine.
Toss carrots and radishes together in bowl with drained bulgur wheat and remaining citrus salad ingredients. Season to taste.