Seared Scallops without grapefruit radish

1 lb large scallop 1 1/2 ounces olive oil salt and pepper 1 cup orange juice 2/3 cup orange juice concentrate 2 tablespoons olive oil 12 large shallots ,[...]

10 sea scallops (tendon removed) 1 tablespoon olive oil 2 mandarin oranges (1 peeled and divided into slices, the other to juice as per below) 1/2 onion ,[...]