I live about 30 minutes SW of Northbrook so limited in help but here’s a few:
Prairie Grass Cafe – American/fine dining. Very, very good food and cocktail/wine menu.
Max and Benny’s – old school Jewish delicatessen. Great corned beef, pastrami, sandwiches and deli style sides.
Francesca’s North – Chicago area Italian restaurant chain with several locations. Haven’t been to this one but have been to several others. All have been good.