Cook the rice according to the package directions.
Meanwhile, in a small bowl, combine the soy sauce, lemon juice, garlic, and sugar and stir until the sugar dissolves. Add the basil and cilantro. Set aside.
Heat a wok or large skillet over high heat. Add 2 tablespoons oil and heat for 30 seconds. Add the seafood and stir-fry until cooked through, 3 to 4 minutes. Transfer to a plate. Wipe out the pan.
Reduce heat to medium-high, add the remaining oil, and heat for 30 seconds. Add the peas and 2 tablespoons water. Cover partially and cook, stirring occasionally, until bright green, about 1 minute.
Add the spinach or watercress and sauce. When it starts to bubble, add the seafood. Stir-fry until warmed through, about 1 minute. Serve immediately over the rice.