Wash the asparagus, cut off the woody ends. Bring 3/4 litres of water and a little salt to the boil, place the asparagus inside and cook covered for about 5 minutes. Lift out the asparagus, drain and let it cool down. Pick up the asparagus water. For the sauce, heat the fat in a pot and sauté the flour in it.
Add 1/2 litre asparagus water and milk while stirring, bring to the boil and simmer for about 5 minutes. In the meantime wash and quarter the tomatoes and remove the seeds. Cut the flesh into small cubes. Wash basil, dab dry and cut into fine strips, except for a little to garnish. Stir the ricotta and instant broth into the sauce and season with salt and pepper. Finally add basil to the sauce and keep warm. Place 2 asparagus spears in a pasta roll and wrap each roll with a slice of Parma ham. (Fill about 16 cannelloni). Place the filled rolls in a greased casserole dish and pour the ricotta sauce over them. Sprinkle with tomato cubes and bake in a preheated oven (electric range: 200 °C/circulating air: 175 °C/gas: level 3) for approx. 45 minutes.
Stir the ricotta and instant broth into the sauce and season with salt and pepper. Finally add basil to the sauce and keep warm. Place 2 asparagus spears in a pasta roll and wrap each roll with a slice of Parma ham. (Fill about 16 cannelloni). Place the filled rolls in a greased casserole dish and pour the ricotta sauce over them. Sprinkle with tomato cubes and bake in a preheated oven (electric range: 200 °C/circulating air: 175 °C/gas: level 3) for approx. 45 minutes. Serve garnished with basil and cherry tomatoes