RecipeCastle

Savory Caramelized Onion and Mushroom Crostini

Savory Caramelized Onion and Mushroom Crostini

Ingredients

  • 1baguette (sliced into 1/2-inch rounds)
  • 3 tablespoonsolive oil (divided)
  • 1 clovegarlic (halved)
  • 2large onions (thinly sliced)
  • 2 tablespoonsunsalted butter
  • 8 ouncescremini or button mushrooms (thinly sliced)
  • 2 teaspoonsfresh thyme leaves (or 1 teaspoon dried thyme)
  • 1 tablespoonbalsamic vinegar
  • Salt and black pepper (to taste)
  • 1/4 cupcrumbled goat cheese or grated Parmesan
  • Fresh parsley or chives (chopped)

Instructions

  1. 1

    Prepare the Baguette: Preheat your oven to 375°F (190°C). Arrange the sliced baguette on a baking sheet. Brush each slice generously with 3 tablespoons of olive oil. Bake for 8–10 minutes until the bread is golden and crisp. Once done, remove from the oven and rub the warm bread with the halved 1 clove of garlic to infuse its flavor.

  2. 2

    Caramelize the Onions: In a large skillet, melt 2 tablespoons of unsalted butter with 1 tablespoon of olive oil over medium heat. Add the 2 large thinly sliced onions along with a pinch of salt. Cook for about 20–25 minutes, stirring occasionally, until the onions become soft and golden brown. Towards the end of cooking, drizzle in 1 tablespoon of balsamic vinegar to enhance sweetness.

  3. 3

    Sauté the Mushrooms: In the same skillet, add the remaining 2 tablespoons of olive oil if needed. Add 8 ounces of thinly sliced cremini or button mushrooms along with 2 teaspoons of fresh thyme leaves, a pinch of salt, and black pepper to taste. Cook for 8–10 minutes, stirring frequently, until the mushrooms are tender and golden.

  4. 4

    Assemble the Crostini: On each baguette slice, generously spoon a combination of the caramelized onions and sautéed mushrooms. If desired, sprinkle with 1/4 cup of crumbled goat cheese or grated Parmesan to add creaminess and richness.

  5. 5

    Garnish and Serve: Finish off your crostini by scattering some chopped fresh parsley or chives on top for a vibrant color. The crostini can be served warm or at room temperature, making them perfect for any gathering.