Boil the barley according to the package.
Cut the salmon into 4 pieces.
Add oil to a non-stick frying pan and fry the salmon fillets on each side on high heat until golden. Remove from the pan and season with salt and pepper.
Chop the garlic and add to the frying pan with the spinach. Fry both until soft.
Add the lemon juice and cook for a couple of minutes.
Serve the spinach with the salmon and barley.