Ingredients
Equipment
Frying Pan
Toaster oven
Cooking Instructions
- Heat the olive oil and butter in a large skillet over medium-low heat.
- Add the sliced onions and a small pinch of salt.
- Cook for 15-20 minutes, stirring occasionally, until the onions are soft, golden, and caramelized.
- Stir in the balsamic vinegar, if using, and cook for another minute.
- Meanwhile, lightly toast the bread until crisp around the edges.
- Arrange the toasted bread on a baking sheet.
- Divide the caramelized onions evenly among the bread slices.
- Top generously with shredded cheese and sprinkle with thyme and black pepper.
- Broil for 2-3 minutes until the cheese is melted, bubbling, and lightly golden.
- Garnish with fresh parsley or thyme and serve warm.
Nutrition
Notes
Cook the onions slowly to develop their natural sweetness and rich caramelized flavor.
Gruyère or Swiss cheese pairs especially well with caramelized onions.
Sourdough or thick rustic bread provides the best crispy base.
Add sliced mushrooms or fresh spinach for a heartier variation.
Gruyère or Swiss cheese pairs especially well with caramelized onions.
Sourdough or thick rustic bread provides the best crispy base.
Add sliced mushrooms or fresh spinach for a heartier variation.