4 oz 85% lean ground beef 1 c Green onions; with tops -chopped 1 Clove garlic; minced 3/4 c Chicken broth 2 tb (light) soy sauce; reduced -sodium 1 tb Chile sauce 1 ts Seasame oil 1/4 ts Hot oil; (optional, see -below) 1/4 ts Red pepper flakes 2 tb Cornstarch 2 tb Water 1 c Bean curd (tofu); cut into -1/2-inch cubes