Prepare the vegetables: Wash and prepare all the vegetables: chop the romaine lettuce, spiralize the carrots, slice the cucumber, thinly slice the bell peppers, cut the zucchinis into thin sticks, and finely shred the purple cabbage. Set aside.
Cook the rice noodles: Cook the rice noodles according to the package instructions. Once cooked, rinse them under cold water to stop the cooking process and prevent sticking. Set aside.
Cook the shrimp: Heat a non-stick skillet over medium heat. Lightly spray the skillet with cooking spray or a small amount of oil to prevent the shrimp from sticking. Add the shrimp and cook for 2-3 minutes on each side, or until they turn pink and opaque. Remove from heat and set aside.
Make the dressing: In a small bowl, combine the sesame oil, soy sauce, oyster sauce, white vinegar, grated ginger, Splenda, Sriracha (if use), salt, and pepper. Whisk until well combined. Taste and adjust seasoning if needed.
Assemble the bowls: Divide the chopped romaine lettuce between two bowls as the base. Arrange the spiralized carrots, sliced cucumber, bell peppers, zucchinis, and shredded purple cabbage on top. Add a portion of cooked rice noodles and the cooked shrimp to each bowl.
Add the dressing: Drizzle the dressing over the bowls just before serving. Toss gently to combine or serve the dressing on the side for dipping.