Peel and chop the onion and garlic. Heat 1 tablespoon of oil in a frying pan. Fry the onion and garlic for about 3 minutes. Add tomato sauce, bring to the boil and reduce for about 10 minutes while stirring
Wash the marjoram, shake dry and chop the leaves, except for something to garnish, from the stalks. Cut mozzarella into slices, ham into strips
In 2 cups whisk 2 eggs and 2 tablespoons of cream. Season with salt and pepper. Heat 1 tablespoon of oil in 2 pans. Pour whisked eggs into the pan and let them fry at medium heat. Spread 2 tablespoons of tomato sauce, 1/4 ham and 1/4 mozzarella on 1 half of each omelette. Season with some marjoram and pepper. Fold the remaining omelette halves over the top
Remove the finished omelettes from the pans and keep warm. Repeat the process with the remaining oil and eggs. Arrange on plates and garnish with marjoram. Add sauce