Vegetable frittata - Netmums

Ingredients

• 1 tbsp butter or coconut oil
• 1/2 onion, sliced
• 2 mushrooms, sliced
• 4 asparagus spears, ends snapped off, chopped
• 6 eggs
• Dash of almond milk
• 1 Knorr Zero Salt Vegetable Stock Cube , crumbled
• 4 small Jerusalem artichokes or new potatoes, cooked and sliced
• 50g Feta cheese, crumbled
• Handful of rocket or watercress, to serve