Cut the Onion and the Garlic in fine chopped pieces and roast it in a pot with 2 tablespoons of butter in low temperature. After 3 minutes, add thyme and the rice and also roast it on low temperature.
Add the glass of white wine and stir the rice. After a minute, also add a bit of the broth and keep stirring. Add broth every few minutes and stir the rice every 1-2 minutes to cook out the starch.
Wash the Zucchini blossoms with hot water and put aside. Cut the Mozarella in 8 longer finger thick pieces and put one in each Zucchini blossom.
Mix the milk, the all purpose flour and the egg in a little bowl until you have a fine dough. Take each Zucchini blossom and roast them in a pan with olive oil golden brown, take them aside.
After about 20-25 minutes of cooking the risotto, check its consistency. If it is cooked, it should still be a bit "al dente" (italian for having a bite). Add the rest of the butter and slice the Parmiggiano cheese over it, stir once more and let it rest aside warm for a few minutes.
Place risotto along with the Zucchini blossoms on a plate and decorate with Lemon peel and a bit Thyme.
Notes
Enjoy the risotto as a first course before a meat or vegetable plate, or have a BBQ or meat dish aside.