1. Half-fill a large skillet with water; season with 2 of the lemon slices, onion, bay leaf, salt and peppercorns; bring to boiling.
2. Place salmon steaks in the pan; cover. Simmer 15 minutes, or until fish flakes easily with a fork; drain.
3. While salmon cooks, heat hollandaise sauce, as label directs.
4. Place salmon steaks on serving plates; spoon the hollandaise sauce over each. Garnish with remaining lemon slices.