Brush chicken fillets with lemon juice
and cut into 4 neat rectangles. Lay 2 spinach leaves on each fillet
and roll up into a sausage shape. Wrap each roll in foil. Bake at 180°C for 20-25 minutes. Meanwhile, puree pimentos with the
onion and tomato puree until smooth. Divide sauce into two bowls. Stir yoghurt into one bowl to make a
pale pink sauce. Carefully spoon equal amounts of each
sauce onto each plate. Unwrap chicken rolls and slice with a
sharp knife. Arrange the chicken slices
decoratively on top of the sauce.