Prep all ingredients as described above.
Prepare the cucumber salad: In a bowl, whisk together rice wine vinegar, lime juice, fish sauce, honey, and a pinch of salt. Add the cucumber, red onion, and sliced chili pepper if using. Toss gently to coat. Top with chopped cilantro and crushed peanuts. Let the salad marinate at room temperature for 10–15 minutes.
Make the Pad Thai sauce: In a bowl, whisk together brown sugar, reduced-sodium soy sauce, rice wine vinegar, lime juice, and fish sauce. Set aside.
Cook the noodles: Prepare the rice noodles according to package instructions. Drain and set aside.
Cook the chicken: In a wok or sauté pan, heat olive oil over medium-high heat. Sauté the red bell pepper and carrots for 1–2 minutes. Add garlic and scallions, and sauté for another minute. Add chicken and sauté to an internal temperature of 165°F (74°C).
Combine: Add the cooked noodles and Pad Thai sauce to the pan. Toss everything together and cook for 1–2 more minutes.
Make the peach ginger chia fresca: Combine all the ingredients. Let sit for 5 minutes to allow the chia seeds to expand, then stir again.
Serve the Pad Thai and garnish with fresh cilantro, chopped peanuts, and lime wedges. Serve with cucumber salad and peach ginger chia fresca.