Cucumbers are often overlooked as a stir-fry ingredient, but they shouldn't be: They're tender, crisp and juicy. Slideshows: Cucumber Recipes
In a medium bowl, toss the chicken with half of the garlic and ginger and the baking soda; season with salt and pepper. In a small bowl, stir the vinegar with the sugar and 1/4 cup of water.
In a large skillet, heat 2 tablespoons of the oil until shimmering. Add the chicken and stir-fry over moderately high heat until the chicken is almost cooked through, 2 minutes; transfer the chicken to a plate. Add the remaining 1 tablespoon of oil to the skillet along with the whole and crumbled dried chiles, cucumbers, vinegar mixture and the remaining garlic and ginger; season with salt and pepper. Stir-fry over moderate heat until the cucumbers are softened and most of the liquid has evaporated, 3 minutes. Add the chicken and serrano and stir-fry until the chicken is cooked through, 1 minute. Stir in the cilantro and season with salt and pepper. Serve with lemon wedges and rice.