Place tofu on a plate between paper towels and put a second plate on top with a heavy weight like a large can for a couple of minutes to press out the water. Cut tofu into to bite-size cubes. Spray large skillet with cooking spray; then heat oils in skillet over medium-high heat. Add tofu, onion and garlic and fry until golden brown, about 15 minutes. Stir occasionally to prevent burning.
Meanwhile bring water to a boil in a medium saucepan. Add noodles from ramen packages, reserving the seasoning envelopes. Boil for about 2 minutes, just until the noodles break apart. Drain.
Add the stir-fry vegetables to the pan with the tofu, and season with the ramen noodle seasoning packets. Cook, stirring occasionally until vegetables are tender, but not mushy. Add noodles, and stir to blend.