Peel and chop the onions. Melt the fat, fry the onion cubes and rice in it until transparent. Deglaze with 1/2 litre water. Season with salt and pepper and cook for about 20 minutes. Stir in peas after 10 minutes.
In the meantime, wash the cutlets, dab dry, tap flatter. Heat oil. Fry the schnitzels for 3-5 minutes on each side. Season with salt, pepper and lemon juice. Take the schnitzels out and keep them warm.
Deglaze the gravy with stock, bring to the boil. Stir in sauce thickener, season with salt and pepper. Refine with cream. Arrange schnitzel and pea rice in portions, garnished with lemon, lettuce leaves and cherry tomatoes.