Preheat oven to 350 degrees F. Grease a 2-quart casserole; set aside. Trim fat from meat. Thinly slice meat across the grain into bite-size strips. In a medium bowl, combine flour and pepper. Add meat, half at a time, tossing gently to coat.
In a large skillet, heat oil over medium-high heat. Cook meat, half at a time, in hot oil until brown (add additional oil, if necessary). Return all of the meat to skillet. Stir in stir-fry vegetables, soup, mushrooms, soy sauce, and ginger.
Meanwhile, cook noodles in boiling water about 3 minutes or just until tender; drain. Stir cooked noodles into meat mixture; stir in the seasoning packet from noodles. Transfer mixture to the prepared casserole. Sprinkle with almonds.
Bake, uncovered, about 35 minutes or until heated through. Makes 4 to 6 servings.