1) Preheat oven to 220C/Gas 8. Place the pizza base on a baking sheet. Scatter spinach all over base. Drizzle with oil. Evenly distribute prosciutto, Parmesan and garlic on top of spinach. Crack eggs onto pizza, roughly positioning one yolk on each pizza quarter.
2) Bake for 12-15 minutes, until spinach is wilted and egg whites are just fully cooked.