Here are a few that go well. Rice with chicken broth and saffron, mashed potatoes, mashed cauliflower, or carrots.
A very traditional side is buttered egg noodles. Get flat, long noodles cook them them toss in butter, season with some salt if you didn't salt the water.
Oven roasted potatoes seasoned with herbes de provence and sauteed haricots verts (S&P) with just a squeeze of lemon juice. Trust me on this.
