Ricco's is one of my favorite Italian spots in OP. Their food is always delicious and they have a good variety for different people's needs (vegetarian, gluten-free, etc.). Reasonable prices overall.
You can't go wrong with any of the pastas and their dessert cart is maybe my favorite part of any visit. I just tried the Sonoma Torte for the first time and I was FLOORED at how good it was. You have to try it. My fam also loves the mushroom risotto and the salmon.
Everything is on the first floor with restrooms in the back. They have outdoor dining when the weather is good. The staff is incredibly nice too.