In a small bowl, whisk together the soy sauce, honey, sesame oil, crushed red pepper flakes, water, and cornstarch until smooth. Set aside.
Heat olive oil in a large skillet or wok over medium-high heat.
Add the diced onion and cook for 2-3 minutes until softened.
Add the minced garlic and grated ginger, cooking for 30 seconds until fragrant.
Add the ground turkey to the skillet. Cook, breaking it up with a spoon, until browned and cooked through, about 6-7 minutes.
Add the broccoli florets to the skillet and stir to combine.
Pour the soy sauce mixture over the turkey and broccoli. Stir well to coat all ingredients.
Cover the skillet and cook for 4-5 minutes, stirring occasionally, until the broccoli is tender-crisp and the sauce has thickened.
Remove from heat and sprinkle with sliced green onions and toasted sesame seeds.
Serve immediately over steamed rice or your favorite grain if desired.