Heat the olive oil in a large skillet or wok over medium-high heat.
Add the minced garlic and grated ginger to the skillet, stirring quickly to prevent burning (about 30 seconds).
Toss in the sliced mushrooms and cook for 3-4 minutes or until they begin to brown and release their moisture.
Add the broccoli florets and red bell pepper slices to the skillet. Stir-fry for another 5 minutes, allowing the vegetables to soften slightly but still retain some crunch.
Mix in the snap peas and soy sauce, then sprinkle with red pepper flakes. Stir-fry for an additional 2-3 minutes until the peas are bright green and tender.
Drizzle the sesame oil over the stir-fry and toss everything to coat. Cook for another minute to heat through.
Remove from heat, sprinkle with sesame seeds, and garnish with fresh cilantro or sliced green onions.
Notes
Adjust red pepper flakes to taste for desired spiciness.