For the short pastry, place the flour, egg, 1 teaspoon salt, sugar, 2 tablespoons cold water and butter in flakes in a mixing bowl and knead with the dough hooks of the hand mixer. Then knead on a floured work surface with floured hands to a smooth dough.
Wrap in foil and chill for about 30 minutes.
Wash the asparagus and cut off the woody ends. Cook the asparagus in salted water for about 5 minutes until al dente. Clean, wash and chop the peppers. Wash, clean and roughly dice the tomatoes. Peel and chop onions and garlic.
Wash the meat, dab dry and cut into cubes.
Heat 1 tablespoon of oil in a frying pan. Fry the meat for approx. 4 minutes, turning it until golden brown. Wash the sage, shake dry and pluck the leaves from the stalks. A
Roll out the short pastry to a circle (approx. 30 cm Ø) on a floured work surface. Place on a baking tray lined with baking paper.
Mix meat, vegetables, garlic, onions and sage in a bowl. Add 2 tablespoons of oil. Season with salt and pepper. Spread the dough with pesto, leaving an approx. 3 cm wide rim all around.
Spread the vegetable mixture evenly over the pesto. Fold the dough edge inwards over the vegetables.
Grate cheese. Spread the rim with 1 tablespoon of olive oil. Sprinkle the cheese on the tart. Bake in the preheated oven (electric cooker: 175 °C/ convection oven: 150 °C/ gas: see manufacturer) on the bottom shelf for approx. 45 minutes.
Remove and garnish with sage.