Preheat oven to 350 degrees.
Line a baking sheet with foil.
Place zucchini flesh side up on the baking sheet. Drizzle with olive oil and bake for 30 minutes or until tender.
In a skillet, heat a tablespoon or two of olive oil.
Add garlic and red pepper flakes. Cook until fragrant and garlic starts to turn golden brown.
Add carrots, broccoli, and mushrooms. Cook until vegetables begin to soften. Add shrimp.
In a small bowl, stir soy sauce, rice vinegar, sesame oil, and ground ginger together.
Pour sauce over the stir-fry and stir.
Cook until shrimp is warmed through.
Remove zucchini from oven and spoon stir-fry into each zucchini half.
Serve immediately with extra soy sauce, if desired.