Preheat oven to 180C (160C fan forced). Lightly butter 2 x 1 1/4 cup ramekins with butter and line a large baking tray with baking paper. Set aside.
Bring a saucepan of lightly salted water to the boil. Add the warrigal greens and blanch for 60 seconds. Transfer to an iced water bath to refresh and then drain well. Squeeze out as much excess liquid as you can.
Take one of the ramekins and using half of the warrigal greens, arrange it in the ramekin in a figure eight. Crack two eggs into the figure eight (one into each circle of the 8) then drizzle with 2 tablespoons of the thickened cream around the outline of the figure eight. (you don't want it on top of the egg yolks if you can help it). Sprinkle with half of the feta and the parmesan cheese. Season with sea salt and pepper. Set aside and repeat the process with remaining ramekin and ingredients to make 2.
Transfer the ramekins onto the baking tray and arrange the prosciutto in a single layer next to them if you can. Lightly spray the prosciutto with olive oil spray. Bake in the oven for 15-18 minutes or until the whites have set but the yolks are still soft and the prosciutto is crisp (you may need to remove the prosciutto at about the 12-15 min mark - so keep an eye on it). Remove from oven. Serve baked eggs topped with crispy prosciutto and with toast of your choice for dunking. If desired and you really must try - serve with my Chilli Garlic Crisp Oil to take it to the next level - or not!