Can this be made in under 30 minutes?

Yes, the recipe is designed to be quick and efficient.

Does it work for meal prep?

Most versions store well for one to three days.

Yes, simple swaps can be made for convenience or dietary needs.

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Preheat the oven to 400°F (200°C).
Slice the baguette into 1/2 inch thick slices and place them on a baking sheet. Brush with olive oil.
Bake the bread for 8-10 minutes or until golden and crispy.
While the bread is baking, heat olive oil in a skillet over medium heat.
Add thinly sliced onions, season with salt and pepper, and cook until caramelized, stirring frequently (about 15-20 minutes).
Once the onions are caramelized, add a splash of balsamic vinegar and stir to combine.
Remove from heat and let cool slightly.
Top each crostini with a spoonful of the caramelized onions.
Optionally, add cheese or fresh herbs on top.
Serve warm and enjoy!

To speed up the caramelization, use a wide skillet and watch the onions closely to avoid burning. Cheese can be added for extra creaminess.