Step-by-step instructions
Step 1: Sauté vegetables
Heat olive oil in a large skillet over medium heat. Add chopped onion and sauté until translucent, about 5 minutes. Add minced garlic and cook for 1 to 2 minutes more, until fragrant.
Step 2: Cook mushrooms
Add sliced mushrooms to skillet and cook until moisture releases and begins to brown, about 8 to 10 minutes. Stir occasionally to ensure even cooking.
Step 3: Make sauce
Sprinkle flour over mushrooms and toss well to coat. This will help thicken the sauce. Gradually pour in the vegetable broth, stirring constantly to avoid lumps. Bring the mixture to a boil and cook until the sauce thickens, about 5 minutes.
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