Begin by making the risotto. In a large pan over medium heat, sauté the onion and garlic in butter until translucent.
Add the Arborio rice and toast for 2 minutes, stirring constantly.
Pour in the white wine and let it simmer until it has almost completely evaporated.
Sprinkle in the saffron threads, then gradually add the warm stock, one ladle at a time, allowing the liquid to be absorbed before adding more. Stir continuously.
Once the rice is al dente and creamy, remove from heat, stir in the Parmesan cheese, and season with salt and pepper. Spread the risotto on a tray to cool.
Once cooled, shape the risotto into small patties.
Prepare three bowls for the breading process: one with flour, one with beaten eggs, and one with breadcrumbs.
Dredge each risotto cake first in flour, then dip in the egg, and finally coat with breadcrumbs.
Heat olive oil in a pan over medium heat and fry the risotto cakes until golden brown on both sides. Drain on paper towels.
For the lemon aioli, whisk together mayonnaise, lemon juice, lemon zest, and minced garlic. Season with salt and pepper.
To serve, plate the risotto cakes, top with a dollop of lemon aioli, and garnish with microgreens.