It’s a concept that just works: Open early, with good Illy coffee and quick-serve and sit-down breakfast items. Stay open throughout lunch, serving up fresh salads tossed in light dressings, pizzas and hearty sandwiches. Continue to serve until well past dinner — affordable wasabi-crusted salmon, more of those pizzas — so people can end their day the way they started it, with a nice cup of joe in this something-for-everyone, always-fresh-and-wholesome eatery. Need proof? Look for Du Jour’s third area location, in Commerce Square, this fall.