Chop the cauliflower into florets and slice the mushrooms. Mince the garlic and chop the onion.

Heat olive oil in a skillet over medium heat. Add the chopped onion and sauté for 2-3 minutes until translucent.

Add the minced garlic and cook for an additional 1 minute until fragrant.

Stir in the cauliflower florets and cook for 5 minutes, stirring occasionally.

Add the sliced mushrooms, salt, black pepper, and dried thyme. Cook for another 5-7 minutes until the vegetables are tender.

Remove from heat and serve warm as a main dish or side.