Take a box grater and place it on its side with the side with the largest grating holes on it face up.
Cut the ends off the zucchini, then push along the top of grater, in long strokes in order to create long, thin ribbons of zucchini (see the animated .gif in the post).
Heat a skillet with the olive oil, then gently fry the zucchini with the garlic until slightly tender. Stir in the pesto, crème fraîche (or whatever creamy ingredient you're using) and the peas (even if they are frozen. They'll defrost quickly in the frying pan). Stir until coated, season with salt and pepper, then take off the heat.
Pile it into a dish (I served mine on a bed of raw spinach leaves), and grate over some lemon zest and Parmesan.