Roast the pine nuts in a pan without fat until golden brown, take them out and let them cool down. Wash the wild garlic, dab dry and remove coarse stalks. Puree bear's garlic, pine nuts and 3 tbsp. olive oil in the universal chopper.
Wash and peel the asparagus and cut off the woody ends. Bring plenty of water with 1 teaspoon of salt and 1 teaspoon of sugar to the boil. Cook the asparagus for about 15 minutes. In the meantime, wash the tomatoes and pat them dry.
Wash the rosemary, dab dry and pluck roughly. Put the tomatoes in a small casserole dish and sprinkle with 1 tablespoon of sugar and salt. Spread the rosemary on top and cook in the preheated oven (electric cooker: 175 °C/ convection oven: 150 °C/ gas: level 2) for about 8 minutes.
Wash the tuna, dab dry and season with salt. Heat 1 tablespoon of oil in a large coated pan. Sauté the fish on both sides for about 2 minutes. Put the pesto in a small pot.
Add cooking cream and white wine and heat while stirring. Season to taste with salt, pepper and sugar. Arrange fish with asparagus, tomatoes and wild garlic sauce. Garnish with rosemary.