How many servings does this recipe make?

This recipe makes 4 servings. You can adjust the portion size directly on this page.

What ingredients do I need for Red Onion Crostini?

You need 9 ingredients. The key ingredients include: 3 tablespoons plus 6 teaspoons olive oil (preferably extra-virgin), 2 ounces pancetta, finely chopped, 3 large red onions, thinly sliced, 1 tablespoon minced garlic, and more.

Is Red Onion Crostini suitable as snacks & appetizers?

Yes, Red Onion Crostini falls under the Snacks & Appetizers category and is a great choice for this type of meal.

How do I store leftover Red Onion Crostini?

Store leftovers in an airtight container in the refrigerator for up to 3–4 days. Reheat gently before serving.

Red Onion Crostini Recipe

Name: Red Onion Crostini
Prep time: 15 min
Cook time: 30 min
Total time: 45 min
Yield: 4 servings
Ingredients: 3 tablespoons plus 6 teaspoons olive oil (preferably extra-virgin); 2 ounces pancetta, finely chopped; 3 large red onions, thinly sliced; 1 tablespoon minced garlic; 1 tablespoon fresh lemon juice; 1 teaspoon fennel seeds, crushed; 2 teaspoons Sherry wine vinegar or balsamic vinegar; 6 5 x 3 x 1/2 -inch slices country-style bread, toasted; Chopped fresh parsley

Try this homemade Red Onion Crostini recipe the whole family will love. Made with olive oil, pancetta, red onions and garlic. Easy step-by-step instruct…

This Red Onion Crostini relies on simple, everyday ingredients such as pancetta, finely chopped, minced garlic, fresh lemon juice and fennel seeds, crushed. It comes together quickly and makes 4 servings, at about 137 kcal each. The step-by-step instructions below are written to be easy to follow, even on a busy day.

It's versatile enough for an easy weeknight dinner yet satisfying enough for guests at the weekend. Serve it with your favorite sides, and keep any leftovers for a quick meal the next day.

Updated Jun 30, 2026

Serves 4 Snacks & Appetizers

Servings: persons

3 tablespoons plus 6 teaspoons olive oil (preferably extra-virgin)
2 ounces pancetta, finely chopped
3 large red onions, thinly sliced
1 tablespoon minced garlic
1 tablespoon fresh lemon juice
1 teaspoon fennel seeds, crushed
2 teaspoons Sherry wine vinegar or balsamic vinegar
6 5 x 3 x 1/2 -inch slices country-style bread, toasted
Chopped fresh parsley

Frequently Asked Questions

Quick Info

Servings
4 servings
Calories
137 kcal
Category
Snacks & Appetizers

Eats Now Editorial Team

Recipe developed & tested in-house

Passionate cooks who develop and test new recipes every day – from quick weeknight dinners to special occasion feasts.

Reviewed by the Eats Now Kitchen Team

More about our team →

Red Onion Crostini

Tips for the best results

Variations & substitutions

My Personal Notes

How did you like this recipe?

Frequently Asked Questions