1 tablespoon sambal oelek (ground fresh chile paste), or more, to taste*
1 tablespoon oyster sauce
1 tablespoon freshly grated ginger
1 teaspoon sesame oil
In a small bowl, whisk together soy sauce, garlic, brown sugar, sambal oelek, oyster sauce, ginger and sesame oil; set aside.
In a large pot of boiling salted water, cook pasta according to package instructions; drain well.
Heat olive oil in a large skillet over medium high heat. Add shrimp and 2 tablespoons soy sauce mixture, and cook, stirring occasionally, until pink, about 2-3 minutes; set aside.
Stir in mushrooms, bell pepper, zucchinis and carrot to the skillet. Cook, stirring frequently, until tender, about 3-4 minutes. Stir in spaghetti, shrimp and remaining soy sauce mixture until well combined, about 2-3 minutes.
Serve immediately, garnished with cilantro, if desired.