Cook the pasta according to the packet instruction.
Add the spinach to the last minute of cooking, then drain them and keep warm.
Meanwhile, finely chop the roasted pepper (reserving the oil too) and push out the garlic flesh of its skin, if used. Put these in a mixing bowl together with the chilli flakes, lemon zest & juice and the olives. Add the drained spinach pasta, and the oil from the red pepper. Combine well.
Divide the pasta between two plates, season with pepper and scatter the grated cheese on top.