Clean, clean and slice the mushrooms. Clean and wash spring onions and salad. Cut spring onions into rings. Whisk eggs and milk with a whisk. Season with salt and pepper
Brush a small coated pan (16 cm Ø) with 1 teaspoon of oil and heat it up. Fry the diced ham and mushrooms in it until golden brown, remove. Pour 1/4 of the whisked eggs and spring onions into the pan and let them fry over medium heat
Fold over the omelette, remove from the pan, fill with 1/4 of the diced ham and mushrooms and keep warm. Repeat the process with the remaining oil, eggs and spring onions, also fill
Spread 4 slices of bread with margarine, cover with salad. Place filled omelettes and remaining slices of bread on top