Peel and finely dice the onion and garlic. Wash basil, shake dry and, except for something to garnish, pluck leaves from the stems and chop. Heat the oil in a pan.
Fry the mince in it until crumbly. Add onion and garlic. Season with salt, pepper and basil. Stir in tomato paste and continue to braise for about 3 minutes. Add peas and chunky tomatoes and stir in.
Melt the fat in a pot. Sweat flour in it, deglaze with broth and milk while stirring. Season to taste with salt, pepper and nutmeg. Fill the cannelloni with the mince. Put it into a greased casserole dish and pour half of the sauce over it.
Keep the rest of the sauce warm. Cut the cheese into cubes and sprinkle over it. Cook in the preheated oven (electric cooker: 200 °C/ convection oven: 175 °C/ gas: level 3) for approx. 30 minutes. Arrange on plates with remaining sauce.
Sprinkle with grated pink berries and garnish with basil.