In a microwave-safe mug, combine almond flour, grated parmesan, baking powder, olive oil, water and egg. Stir well until the mixture forms a dough-like consistency.
Microwave on high for 1 to 1.5 minutes, or until the base is set and firm to the touch.
Top with the pizza sauce, Italian seasoning and the shredded mozzarella.
Microwave for an additional 20-30 seconds or until the cheese is melted and bubbly.
Let it cool for a minute or two before enjoying your delicious keto mug pizza!