Heat the chicken broth in a saucepan.
In a separate pan, melt the butter over medium heat. Once melted, add in the shallots, garlic and mushrooms and sauté until the mushrooms become soft.
Add in the rice and sauté about 5 minutes until just starting to brown.
Pour in the white wine and half of the salt and bring to a simmer. Allow the wine to absorb into the rice.
Add 1/2 cup of the warmed chicken broth into the rice and stir constantly until mostly absorbed. Repeat this step until all the chicken broth has been added to the rice. (Begin the scallops after you have added the last 1/2 cup of broth)
Add in 1/2 cup of the pecorino romano, reserving 1/4 cup. Stir until all the cheese has melted into the risotto.