Saute onions, garlic, and mushrooms (about 5 minutes).
Add arborio rice, stir constantly (about 3 minutes).
Add 1c broth plus some salt and pepper. Let most water absorb.
Add another cup broth plus the tomatoes, basil, and parsley.
As broth absorbs, add 1 cup at a time, stirring frequently.
Scoop in bowls, top with parm cheese.