1. Whisk together cornstarch and 1 tsp. water in bowl. Whisk in soy sauce, ginger, chile sauce, garlic, and sesame oil.

2. Heat 1 Tbs. canola oil in large skillet or wok over medium-high heat. Stir-fry tofu 7 minutes, or until golden brown; transfer to plate. Add 1 Tbs. oil to pan. Stir-fry bok choy 4 minutes; transfer to plate.

3. Add remaining 1 Tbs. oil to pan. Stir-fry mushrooms 2 minutes, or until tender. Return tofu and bok choy to pan. Stir in soy sauce mixture, and stir-fry 1 minute, or until hot.