Low Histamine Quiche

Tanya Eisenwasser

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A crustless quiche built without aged cheese, bacon, or cream. Fresh eggs, full-fat coconut milk, zucchini, leek, and fresh herbs do all the work.

Prep 15 min

Cook 35 min

Serves 6

Gluten-freeDairy-free

Ingredients

• 6 large eggs
• 1 cup full-fat canned coconut milk (check the label for guar gum or carrageenan if you're sensitive)
• 1 medium zucchini, grated (about 1 1/2 cups grated)
• 1 medium leek, white and light green parts only, thinly sliced and well washed (about 1 cup sliced)
• 2 tablespoons extra-virgin olive oil
• 1 tablespoon fresh thyme leaves
• 2 tablespoons fresh parsley, finely chopped
• 1/2 teaspoon sea salt
• 1/4 teaspoon black pepper (optional)
• 1 tablespoon cassava flour or arrowroot starch (helps the filling set without weeping; bump to 2 tablespoons if your coconut milk is on the thinner side)

Instructions

Prep

1. Preheat your oven to 375°F (190°C).
2. Lightly oil a 9-inch pie dish or a similar shallow round baking dish.

Drain the Zucchini

1. Place the grated zucchini in a clean kitchen towel or several layers of paper towel.
2. Wring out as much liquid as you can. This is the single most important step. Wet zucchini turns a quiche soggy.

Cook the Vegetables

1. Heat the olive oil in a large skillet over medium heat.
2. Add the sliced leek and a pinch of the salt. Cook for 4 to 5 minutes, stirring often, until soft and just starting to turn golden at the edges.
3. Add the drained zucchini and the thyme. Cook for another 3 to 4 minutes, stirring, until any remaining moisture has cooked off and the zucchini looks slightly translucent.
4. Remove from the heat and let the mixture cool for about 5 minutes. Hot vegetables will scramble the eggs when you mix them in.

Mix the Custard

1. In a large bowl, whisk the eggs until smooth.
2. Add the coconut milk, cassava flour, parsley, the rest of the salt, and pepper if using. Whisk until fully combined and no lumps remain.
3. Stir in the cooled vegetables.

Bake

1. Pour the mixture into the prepared pie dish and smooth the top.
2. Bake for 30 to 35 minutes, until the center is just set. The top should be lightly golden, and the middle should jiggle slightly when nudged but not look liquid.
3. Let the quiche rest for 5 to 10 minutes before slicing. This helps the custard finish setting so the slices hold together.

Serve

1. Slice into 6 wedges.
2. Serve warm with a simple side, such as roasted potatoes or a small salad of fresh greens with olive oil.

Tips & Substitutions

• Use the freshest eggs you can find. Pasture-raised eggs from a local farm or a recent carton from the store are ideal. Freshness matters for almost every ingredient in a low histamine kitchen, and eggs are no exception.
• Add fresh-cooked protein if you want a heartier quiche. Stir in 1 cup of fresh-cooked diced chicken or fresh-cooked crumbled breakfast sausage before pouring the custard in. Cook the protein the same day and skip any pre-cooked or deli versions.
• Swap leek for shallot, fresh onion, or chives. Leek is sweeter and gentler than onion, but if you can't find one, use 1/4 cup finely diced shallot or fresh onion cooked the same way. If you react to alliums in general, leave them out and stir in 2 tablespoons of fresh chives or extra parsley at the end.
• Sensitive to eggs? Egg whites can trigger reactions in some people, even though eggs themselves are not high in histamine. There is no clean swap that gives you the same texture, so this is a recipe to skip if eggs are a known issue for you.
• Coconut milk alternatives. Oat milk works in a pinch, but the quiche will be less rich. Avoid almond or cashew milk if nuts are a trigger. Whichever milk you use, check the label and skip ones with carrageenan, gums, or natural flavors if you tend to react to additives.
• Want a crust? Press a basic cassava flour or rice-flour dough into the pie dish and pre-bake it for 10 minutes at 375°F (190°C) before adding the custard. Crustless is simpler and bakes in less time.
• Don't skip wringing out the zucchini. Even a few extra tablespoons of water will turn the bottom of the quiche soggy and prevent it from setting cleanly.

Why This Works

Fresh eggs. Naturally low in histamine and the structural backbone of any quiche. Some people find that egg whites trigger reactions even though eggs themselves are not high in histamine, so individual response varies.

Full-fat coconut milk. A common stand-in for cream in a dairy-free kitchen. It gives the custard richness and a soft set without needing dairy or aged cheese, both of which are common triggers for many people.

Fresh zucchini. Generally well tolerated and considered low in histamine. Cooking off the moisture concentrates the flavor and keeps the quiche from turning watery.

Leek. A milder member of the allium family than onion or garlic. Sweeter, gentler, and commonly tolerated by people who find raw onion or garlic harder to handle.

Fresh thyme and parsley. Fresh herbs add depth without relying on premade spice blends, which can include anti-caking agents or natural flavors that some people react to.

Cassava flour. Helps the custard set cleanly without weeping. Cassava is one of the more commonly tolerated low histamine flours and keeps the recipe gluten-free.

Storage

Quiche is best eaten fresh the day it's made. Cooked eggs and any added protein accumulate histamine over time, even in the fridge, and reheated egg dishes are a common trigger for sensitive people. If you want to save portions, slice the quiche once it has cooled, wrap individual slices tightly, and freeze right away rather than refrigerating. Thaw and reheat only what you'll eat. Some people find that even frozen leftovers can trigger symptoms, so trust your own response.

Not sure if an ingredient is safe? Histamine Tracker includes a database of 1,000+ foods with histamine ratings to help you cook with confidence.