This salad takes the core ingredients of a quiche Lorraine โ crispy bacon, caramelized onions, and grated Gruyรจre โ and serves them over mixed greens with a Dijon-vinegar dressing. It comes together in 30 minutes and lands at 288 calories a serving. If you want the flavors of a rich French tart without turning on the oven, this is a practical way to get there.
Before you start
Two things determine whether this salad is good or just okay. First, the onions. The recipe says 5 minutes, but real caramelization โ the kind that turns sharp raw onion into something sweet and jammy โ takes closer to 20โ25 minutes over medium-low heat. Rushing it gives you softened onion with a slightly bitter edge, not the deep golden result that balances the salty bacon. Start the onions first, before anything else. Second, let the bacon and onions cool completely before they go on the greens. Hot fat wilts arugula and spinach within seconds, and youโll end up with a warm, soggy mess instead of a salad with contrasting textures.
Mistakes to avoid
- Grating the Gruyรจre too far ahead. Pre-grated cheese dries out and clumps. Grate it fresh right before assembling so it stays loose and actually distributes through the salad instead of sitting in a lump.
- Under-seasoning the dressing. Dijon and white wine vinegar are both sharp on their own. Taste the dressing after emulsifying and adjust โ it should taste slightly too bold on its own, because the greens and cheese will mellow it out once tossed.
- Skipping the bacon fat in the pan. The recipe keeps 1 tablespoon of bacon fat to cook the onions. Swapping it out for olive oil works, but you lose the smoky depth that ties the whole salad together. Keep the fat if you can.
- Overdressing. Dress it at the table โ a pre-dressed salad goes limp fast. Use just enough dressing to lightly coat the leaves; you likely wonโt need every drop.
- Using pre-washed greens straight from the bag. Bag moisture makes greens go soggy faster. Spin them dry or pat them with a clean towel before assembling.
Leftovers and meal prep
This salad stores well in components. Cook a double batch of bacon and caramelized onions on Sunday โ both keep in the fridge for up to 4 days in separate airtight containers. The dressing holds for 5 days in a sealed jar; shake or whisk before using since it will separate. Keep the dry greens and halved tomatoes together in a container lined with paper towel, which absorbs excess moisture and keeps them crisp for 2โ3 days. Grate the Gruyรจre fresh each time if you can, or store it in a small sealed container for up to 3 days. When youโre ready to eat, pull everything out, assemble, and dress to order. A fully assembled and dressed salad does not hold โ the greens will be wilted within 30 minutes.
Lorraine Bacon and Onion Salad
Ingredients
Main Ingredients
- 150 grams smoked bacon preferably thick-cut for a robust flavor
- 1 large onion sliced thinly
- 4 cups mixed salad greens such as arugula, frisรฉe, and baby spinach
- 1 cup heirloom cherry tomatoes halved
- 100 grams gruyรจre cheese freshly grated
For the Dressing
- 2 tablespoons Dijon mustard
- 1 tablespoon white wine vinegar
- 3 tablespoons extra virgin olive oil preferably cold-pressed
- 1 pinch salt to taste
- 1 pinch black pepper freshly ground
Instructions
- Prepare the Bacon and Onions: In a skillet over medium heat, cook the bacon until crisp, about 5 minutes. Remove and drain on paper towels. Retain 1 tablespoon of bacon fat in the skillet. Add the onions, stirring occasionally, and cook until caramelized to a deep golden brown, about 5 minutes.
- Assemble the Salad: In a large mixing bowl, combine the mixed greens, cherry tomatoes, and gruyรจre cheese. Add the cooled bacon and caramelized onions.
- Prepare the Dressing: In a small bowl or mason jar, whisk together the Dijon mustard and white wine vinegar. Slowly drizzle in olive oil while continuing to whisk until emulsified. Season with salt and pepper to taste.
- Toss and Serve: Pour the dressing over the salad, gently toss to coat all ingredients evenly, and serve immediately for the freshest flavors.
Notes
Nutrition
Your questions, answered
Can I use regular bacon instead of smoked?
You can, but the salad will taste noticeably different. Smoked bacon provides the deep, savory backbone that makes this salad echo a quiche Lorraine โ unsmoked bacon is milder and the whole dish will feel flatter without another smoky element to compensate.
What greens work best if I canโt find frisรฉe?
Arugula and baby spinach alone work well. Frisรฉe adds a slightly bitter, chewy contrast that holds up to the warm toppings, so if you canโt find it, a small handful of radicchio or endive gives a similar effect.
Can I make the dressing creamy instead of a vinaigrette?
Yes โ whisk in a tablespoon of crรจme fraรฎche or plain Greek yogurt after emulsifying the oil. It thickens the dressing and leans closer to the creamy quality of a quiche filling, though it will shorten the dressingโs fridge life to about 2 days.
My caramelized onions always burn before they soften. What am I doing wrong?
The heat is too high. Keep it at medium-low and add a small splash of water if the pan looks dry or the onions start to stick and darken too fast. Patience is the only real fix โ low and slow is the only way to get them properly golden without burning.