Broccoli and Brown Rice

2 (3 ½-oz.) bags boil-in-bag brown rice1 T. olive oil1 c. finely chopped onion8 oz. sliced mushrooms8 oz. skinless, boneless chicken thighs, cut into bite-size piecesSalt, black pepper1 (12-oz.) bag microwave-in-bag fresh broccoli florets1 ½ c. milk3 T. flour1 c…