Directions:

Wash the spinach, unless already washed and trimmed.  Prepare the sauce by mixing in a bowl the olive oil, lemon juice, salt and pepper, onion and tomato until the sauce becomes nice and creamy though the emulsion process.

In a hot pan, melt the butter and sauté the garlic making sure not to burn it, then add the spinach and cook until soft.  Season and place in the centre of the plate.

Take another hot pan, drizzle some olive oil and when hot, place your sole fillet and cook for a few minutes.  When nice and golden, flip over and repeat the same process.  Place the cooked fish on top of the spinach.

Drizzle some sauce all around your fish and serve right away.