Preheat the oven to 180°C. Combine the coconut flour, herbs, salt and pepper. In a separate bowl, beat the eggs until fluffy. Mix the eggs into the flour mix, then mix in the cream.
Line a tray with baking paper and grease the paper. Place the dough on the tray and, using your fingers, push towards the edges to make a round shape. It should be just less than five-millimetres thick. Bake for 15 minutes.
While baking, sauté the red onion and garlic in the oil over a medium heat for two minutes. Add three tablespoons water and continue to sauté until it’s absorbed. Add the tomatoes and 60ml water; reduce for about 15 minutes, stirring occasionally.
Remove the pizza base from the oven, spoon the sauce all over, then add the mushrooms and cheese and bake for a further five minutes.
Serve with parsley, lemon zest and extra black pepper.