Heat olive oil in a large skillet over medium-high heat.
Add minced garlic and grated ginger to the skillet. Sauté for about 30 seconds until fragrant.
Toss in the button mushrooms and cook them for 3-4 minutes until they start to brown.
Pour in the soy sauce and sesame oil. Give it a good stir to coat the mushrooms evenly.
Sprinkle red pepper flakes, a pinch of salt, and a dash of black pepper. Mix well to infuse the flavors.
Gradually add the baby spinach leaves to the skillet. They will wilt down quickly. Stir-fry for another 2 minutes until the spinach is slightly wilted.
Taste and adjust the seasoning if needed.
Your Vegan Mushroom and Spinach Stir-Fry is ready! Transfer it to serving plates.
Garnish with sesame seeds and chopped green onions for an extra pop of flavor and visual appeal.