Chopping dates. Peel and chop onion. Heat 1 tablespoon of oil in a pot. Fry dates and onion in it. Add frozen spinach and about 100 ml water, bring to the boil and cook for about 10 minutes. Season to taste with salt, pepper and caraway, drain.
Wash the rosemary, pluck the needles, chop. Peel the beetroot (put on disposable gloves), cut into slices. Mix with 2 tablespoons of oil, season with salt, pepper and rosemary.
Preheat oven (electric cooker: 200 °C/circulating air: 175 °C/gas: see manufacturer). Coat a baking tray with oil. Wash the meat, dab dry. Cut a pocket into each one horizontally. Season with salt and pepper.
Fill with spinach mix.
Spread the meat and beetroot on the tray. Roast in the hot oven for about 30 minutes. Wash and halve the tomatoes. Distribute on the baking tray about 10 minutes before the end of the cooking time and fry with the tomatoes. Arrange everything.