Risotto with Radicchio di Treviso in red wine

Difficulty:  Time: INGREDIENTS (x 4 persons): - 2-3 shallots, finely chopped - extra virgin olive oil - 1 glass of dry rich red wine - 1 liter of hot vegetable or chicken stock - 2 large bunches of ‘Radicchio di Treviso’ - 320 g of risotto rice (Vialone Nano or Carnaroli type) - 40 g of unsalted butter - salt, ground pepper - 1 rich ...