Bring milk and 750 ml water to the boil. Add 1 tablespoon butter and about 1 teaspoon salt. Stir in semolina. Continue stirring over low heat for 5 minutes. Cook for another 15 minutes on a switched off hotplate. Stir from time to time.
Peel onion and garlic. Cut onion into slices. Wash the asparagus and cut off the woody ends. Cut asparagus spears into 3 pieces. Heat oil, fry minced meat for about 6 minutes while turning. After 3 minutes add asparagus and onion. Season with salt, pepper and herbs. Press garlic through a garlic press. Pour in the stock, bring to the boil, season with salt and pepper. Stir the starch into 2 tablespoons of water until smooth and thicken the sauce. Stir parmesan into the polenta.
After 3 minutes add asparagus and onion. Season with salt, pepper and herbs. Press garlic through a garlic press. Pour in the stock, bring to the boil, season with salt and pepper. Stir the starch into 2 tablespoons of water until smooth and thicken the sauce. Stir parmesan into the polenta. Arrange polenta and asparagus mince sauce on plates. Place 1 teaspoon of butter on each polenta and melt