Chorizo and Salad Cress Frittata - Deliciously Yorkshire

Ingredients

• 1 punnet of salad cress
• 225g new potatoes, cooked and diced
• 2 tsp olive oil
• 1 small red onion cut into mini wedges
• 85g chorizo sausage, skinned and chunky chopped
• 4 large eggs
• 1 tbsp milk
• A pinch of freshly ground black pepper and salt