Chicken and Cauliflower Stir-Fry
1 (10.75 ounce) can cream of mushroom soup (s… 1 (20 ounce) package skinless, boneless chick… 1 cup water, or to taste, divided 1 head cauliflower, cut into florets 1 tablespoon sesame oil 1 ½ teaspoons white sugar 2 tablespoons canola oil 2 tablespoons cornstarch 3 tablespoons light soy sauce 4 cloves garlic, smashed ¼ cup canola oil for frying, or as needed ¼ cup oyster sauce ¼ cup water ½ teaspoon garlic powder ¾ teaspoon salt ¾ teaspoon white sugar