Warm the stock with the saffron: Put the 600 ml stock in a small saucepan and bring to a gentle simmer; remove from the heat and add the crushed saffron threads. Keep the stock warm over the lowest heat or on a very low burner. WHY: Warm stock prevents shocking the rice and helps it cook evenly; steeping saffron in warm liquid extracts its color and aroma so the risotto gains an even, fragrant lift.

Prepare the mushrooms: Heat a large sauté pan over medium-high heat. Add 1 teaspoon of olive oil (from the 1 tbsp) and a light pinch of salt. Add the sliced mushrooms in a single layer and allow them to brown undisturbed for 2–3 minutes, then toss and cook until golden and any moisture has evaporated (about 4–5 minutes total). Remove mushrooms to a bowl and set aside. WHY: Browning the mushrooms concentrates their umami and prevents them from releasing too much liquid into the risotto later, which would dilute flavor and texture.

Crisp the sage leaves: In the same pan, add 1 tbsp olive oil and warm over medium. When shimmering, add the sage leaves and fry for 20–30 seconds per side until crisp. Transfer to a paper towel-lined plate and season lightly with salt. WHY: Frying sage in olive oil releases its aromatic oils and creates a brittle, aromatic garnish to contrast the risotto's creaminess. Do this early so the oil is flavored and can be used in the next step if you like.

Start the soffritto and toast the rice: In a heavy-bottomed skillet or wide saucepan, add 1 tablespoon olive oil (or use the sage-flavored oil left in the pan) and 10 g (half) of the butter over medium heat. Add the minced shallot and sauté gently until translucent and fragrant—about 2–3 minutes. Add the Arborio rice and stir to coat the grains in oil/butter, toasting for 60–90 seconds until the edges of the grains look a little translucent. WHY: Sweating the shallot builds a subtle sweet base; toasting the rice coats the starches and starts the nutty flavor while helping the rice release its starches gradually during cooking for the signature risotto creaminess.

Deglaze with wine: Pour in the 50 ml white wine and stir until mostly evaporated. Scrape any fond from the pan. WHY: The wine adds acidity and flavor depth; allowing it to evaporate prevents a boozy taste and creates a balanced base for the stock absorption.

Add warm saffron stock, ladle by ladle: Add a generous ladle (about 120 ml) of the warm saffron-infused stock to the rice and stir until nearly absorbed. Continue adding stock in 2–3 ladlefuls, stirring often, allowing each addition to be mostly absorbed before adding the next. Total cooking time from the first stock addition should be about 16–18 minutes—taste after 14 minutes for doneness; the rice should be al dente with a creamy but not soupy texture. WHY: Ladle-by-ladle addition and frequent stirring help the rice release surface starch gradually, creating that silky, creamy texture without using cream. Stirring also helps even cooking and prevents sticking.

Fold in mushrooms and finish: With the last small ladle of stock added and mostly absorbed, fold the browned mushrooms back into the risotto. Remove the pan from the heat and immediately stir in the remaining 10 g butter and the 30 g grated Parmigiano-Reggiano until melted and glossy. Adjust seasoning with salt and freshly ground black pepper. WHY: Adding mushrooms at the end preserves their texture and concentrated flavor. The cold butter and cheese mounted in off-heat residual heat create a glossy emulsion (mantecatura) that gives risotto its luxurious mouthfeel.

Plate and garnish: Spoon the risotto into warm shallow bowls (risotto tends to firm as it cools). Top each portion with three crisped sage leaves and a light grating of Parmigiano if desired. Serve immediately—risotto is best when served right away. WHY: Serving warm and immediately preserves the ideal creamy texture; garnishes add visual contrast and textural crunch.