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Sautéed Spinach, Mushrooms & Caramelized Onions

A flavorful one-pan vegetable side dish featuring caramelized onions, sautéed mushrooms, and tender wilted spinach. Perfect with any dinner.
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Prep Time 10 minutes
Cook Time 25 minutes
Total Time 35 minutes
Servings: 4 servings
Course: Side Dish
Cuisine: American
Calories: 120
Ingredients Equipment Method Notes

Ingredients
  

Vegetables
  • 2 large onions thinly sliced
  • 8 oz mushrooms sliced
  • 4 cups fresh spinach
Seasoning & Aromatics
  • 2 tbsp olive oil
  • 1 tbsp butter
  • 2 cloves garlic minced
  • 0.5 tsp salt
  • 0.25 tsp black pepper
  • 0.5 tsp thyme optional

Equipment

  • Large skillet
  • Wooden spoon
  • Chef’s knife

Method
 

  1. Caramelize onions in olive oil and butter for 15–20 minutes until golden.
  2. Add mushrooms and cook until browned and moisture evaporates.
  3. Stir in garlic and thyme; sauté briefly.
  4. Add spinach and cook until wilted.
  5. Season with salt, pepper, and optional lemon.

Notes

For extra flavor, add a splash of balsamic vinegar while sautéing mushrooms.