Rehydrate porcini: put 15 grams dried porcini in a small bowl, cover with 1 cup of hot water. Let sit 15–20 minutes. Strain through a fine sieve or coffee filter into a jar and reserve the liquid. Chop the rehydrated porcini finely.
Warm the 4 cups chicken stock in a saucepan;
Prep mushrooms: slice 2 cups baby bella mushrooms, tear/chop 1 cup maitake, cut 2 king trumpet into 6–8 thick coins. Pat all dry.
In a dry skillet toast the chopped ½ cup walnuts (~3–4 minutes) until fragrant; set aside. Make walnut cream: blitz ¼ cup walnut + 2–3 tbsp hot reserved stock in a blender until smooth; add more stock if needed to reach a loose cream.
Peel & thinly slice 2 large shallots. Mince 3 cloves garlic. Zest the lemon and juice half.
In a medium skillet over medium-low heat, heat 1 teaspoon olive oil + 1 tablespoon butter. Add 2 large shallots(sliced) and a pinch of salt. Cook slowly, stirring occasionally, until deep golden and jammy, about 12–18 minutes. If they start to brown too fast, lower the heat. Remove and set aside.
In a wide heavy-bottomed pan, heat 3 tablespoons olive oil over medium. Add the finely diced 1 small onion and a Pinch salt ; sweat until translucent, ~4–6 minutes. Add minced 3 cloves garlic for 30 seconds.
Add the 1 ½ cups arborio rice and stir to coat — toast for 2–3 minutes, until the edges look translucent but the centers are still chalky. This gives a better texture.
Pour in 1 cup dry white wine (or extra stock) and stir until nearly all the liquid has evaporated.
Begin ladling in warm stock (including 2–3 tbsp of the reserved porcini soaking liquid). Add stock one ladle at a time, stirring often but not constantly. Wait until most liquid is absorbed before adding the next ladle. Maintain a gentle simmer, not a boil.
After ~8–10 minutes of gradual stock additions (rice should be loosening but still chewy), add the sliced baby bellas and chopped rehydrated porcini. Continue adding stock ladle by ladle and stirring.
At about 14–16 minutes total cooking for the rice (taste test!), stir in the chopped maitake so it cooks but keeps some texture. The rice should be al dente with a creamy, slightly loose sauce.
In a hot skillet, add a good drizzle of olive oil. Sear king trumpet coins 2–3 minutes per side until golden; remove and keep warm. In the same pan, quickly sear a handful of maitake pieces until edges crisp. Optionally, fry a few sage leaves in butter for 15–20 seconds until crisp; drain on a paper towel. Keep all toppings warm.
When rice is done (usually 16–18 minutes total from first stock), remove from heat. Stir in: 3 tablespoons butter (previously browned), add 2 tablespoons tahini, walnut cream and toasted walnuts.
Fold in caramelized shallots, Juice + zest of ½ lemon to brighten
Garnish with a handful of Fresh thyme or sage
Taste and season with salt + black pepper. If risotto is too thick, loosen with a splash of hot stock. If too thin, simmer 1 minute.
Spoon risotto into warmed bowls. Top with seared king trumpet coins and crispy maitake. Scatter remaining toasted walnuts, a few caramelized shallot ribbons, and flaky salt. Drizzle a little brown butter or olive oil and add the fried sage leaf(s). Finish with a small lemon wedge on the side.
Notes
Don’t rush the rice - slow ladles of hot stock create that creamy texture, think steady and relaxed, not fast and furious.Keep your stock warm - cold liquid shocks the rice and stalls cooking. A barely simmering pot nearby keeps everything smooth.Sear mushrooms in batches - overcrowding = steaming, not browning. Give them space so they caramelize and build flavor.