Prepare all ingredients. Grate the cheese.
Add melted butter, onion and garlic to a saucepan and heat until onion is translucent. Add the cereal and stir until it becomes buttery and crumbly. Pour in water and brew the cereal until it becomes a thick porridge. Add Parmesan and continue stirring.
Line a baking pan or baking sheet with parchment paper and spread the polenta in an even layer. Smooth the surface and sprinkle with olive oil. Bake in the oven on the top grill until golden brown, then cool and cut into toast. You can also warm the toast in a frying pan before using it.
Cut the onion into small cubes, wash the spinach well and dry. Cut the olives in half lengthwise. Heat the pan and add 10 g butter. Once it's melted and sizzling, add two polenta toasts and lightly fry them on both sides.
Place butter and onion in the same heated frying pan, fry for a minute, add olives and spinach. Cook, stirring for a minute or two, until the spinach begins to wilt, then add the cream, Parmesan cheese and Worcestershire sauce and bring to a gentle simmer. Remove from heat and add salt and chopped basil.
Place creamed spinach on a plate, then two crispy polenta toasts and top with one fried egg.