Bake this irresistible Portobello & Onion Tart at home. Made with pastry, olive oil, baby portobello mushrooms and onion. Easy step-by-step instructions…
This Portobello & Onion Tart relies on simple, everyday ingredients such as olive oil, divided, salt and large eggs. It comes together quickly and makes 4 servings, at about 277 kcal each. The step-by-step instructions below are written to be easy to follow, even on a busy day.
Whether you're rounding off a family dinner, bringing a treat to a gathering, or simply satisfying a sweet craving, this Portobello & Onion Tart delivers. Serve it warm or at room temperature, and add a scoop of ice cream or a spoonful of whipped cream for an extra-special finish.
Updated Jun 30, 2026