The stock from step 1 should be gently simmering. Keep on a low heat for the risotto.
Place the feta cubes in a microwave-safe bowl and cover with warm water. Place in the microwave for one to two minutes to cook off the acidity.
Place the same pot used for the spinach (wipe down if necessary) over a medium-low heat. Melt 2 Tbsp of butter and add the spring onion whites and nutmeg. Sauté until translucent.
Add the arborio rice and stir to coat the grains (add more butter if it's cooked off too much). Toast lightly for a minute or two.
Deglaze the saucepan with the wine. Stir until all the liquid has absorbed.
Add the simmering stock one ladle (or ½ a cup) at a time. Stir each ladleful of stock into the risotto and allow all the liquid to absorb whilst stirring occasionally. Continue until the rice is al dente (not all the stock may be necessary).
Take the risotto off the heat and add the remaining 1 Tbsp of butter and the cheeses. Stir briefly to combine and cover with the lid. Rest for 5-10 minutes.
After resting, stir to combine the melted butter and cheese (the feta should remain in chunks).
Add the spinach puree and stir to combine. Add the fresh dill and a squeeze of lemon juice to taste. Season with salt and pepper if needed. Spoon into serving bowls and top with a square of the phyllo crinkle. Garnish with fresh dill and spring onion greens. Serve immediately.