Preheat your oven to 220°C (425°F). Trust me when I say, a hot oven is your best friend here. This ensures that your popovers puff up beautifully.
In a medium bowl, crack the organic egg and whisk it thoroughly. Add in the cottage cheese and Greek yogurt. This mixture needs to be creamy and cohesive. Add the lemon juice and give it another good whisk. The acidity from the lemon balances the richness of the dairy.
Now, it’s time to sift in the wholemeal self-raising flour. Give it a gentle fold to avoid over-mixing. When it’s just combined, sprinkle in the finely grated aged Parmesan, followed by a dash of hot chili sauce, chopped basil, and a pinch of salt and pepper.
Next, gently fold in the diced ham, sliced mushrooms, and diced plum tomato. You want these goodies to be evenly distributed throughout the batter. It should look colorful and inviting.
Grease your popover pan well. You can use a non-stick spray or a bit of oil with a paper towel. Each cup should be generously oiled to ensure easy release.
Divide the batter evenly among the cups, filling them about two-thirds full. Pop the pan into your preheated oven and bake for about 20-25 minutes. You’ll want to keep that oven door shut during baking—no peeking! The popovers need that consistent heat to rise.
Once they are puffed and golden, remove them from the oven and let them sit for a minute. Give them a light poke if you want to let out steam. Serve immediately with fresh arugula on the side. Dig in while they’re warm!