This simple, Roasted Sliced Sweet Potato recipe calls for just oil, salt, and sweet potatoes; it really couldn't get any simpler. Plus they freeze better than any other low histamine vegetable, losing no discernible texture, flavor, or aroma.
For other easy sweet potato recipes, try my air fryer sweet potatoes or squash sweet potato soup!
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✔️ Why This Recipe is Great
Low Histamine Side Dish: One of the first things I googled when looking into this diet was 'are sweet potatoes low histamine?' with at least three question marks at the end.
In the end, sweet potatoes are one of the 15 foods I let myself eat during my first week of a low histamine diet. I immediately saw a difference in my mental & physical health when I started the low histamine diet, and sweet potatoes have stayed a staple of my kitchen throughout this journey.
Bread Substitute: If you've been looking for a way to enjoy a sandwich but can't yet tolerate any low histamine breads, thick slices of roasted sweet potato make a great base for a crostini-like dish.
Great Source of Vitamin A: Sweet potatoes are high in fiber and nutrients like vitamin A and potassium, and make for a great nightshade-free substitute for roasted potatoes.
🍠 Ingredients
Sweet Potatoes: you can use any variety of sweet potatoes, but try to buy organic if available, because these crisp up even better skin-on.
Olive Oil: olive oil may have a mild smell, but you can’t taste it much in here. If you need to substitute, avocado oil will be the next best option.
Raw Garlic: while not everyone is ready to add it back in, using raw garlic adds an umami element to the slices that really complements meats and root vegetables, like sweet potatoes.
See recipe card for exact ingredients and quantities.
🥣 How to Make Roasted Sweet Potatoes (Step-by-Step)
Step 1) First, preheat your oven to 400°F (205°C). Then wash your sweet potatoes very carefully, scrubbing gently with your nails and removing any little sprouts on the spud (these are usually purple, but can also be white). Cut off any bruised or exposed parts where dirt may have gotten in, as you'll want to keep the skin on for this roasted sweet potato recipe. This isn't just because it's faster to prep the ingredients if you don't have to peel them, either, but because it makes for a much more enjoyable dish.
Step 2) Once the spuds are clean, cut them into thick, even slices (image 1), making the end pieces slightly larger. For a very large potato, make a slices a bit thinner (around 4mm), but for smaller 'taters make them 6-7mm thick.
Step 3) Arrange the slices one layer thick on your baking sheet, then drizzle the oil evenly across all the pieces (image 2). Don't worry about the bottom of each slice, as the oil will make its way under each piece as they cook.
Pro-Tip: You can sprinkle sea salt and any spices you want on right now, or add salt later, but don't put any "raw" spices on the slices once they're cooked or everything will taste a bit bitter.
Step 4) Put the tray in the preheated oven and set the timer for 20 minutes. After 20 minutes, take out the tray and flip over each individual slice; they should be browned on the underside.
Step 5) While your sweet potatoes are baking, take out your garlic cloves and mince them. After the first 20 minutes of baking, add your minced garlic to the tray and bake for an additional 10 minutes, then take them out of the oven to cool. Add any additional salt & pepper now, and enjoy the sweet, soft potato inside each slice, and the chewy, caramelized outsides!
🍯 Variations
- Herb-Roasted Sweet Potatoes – Toss with fresh or dried thyme, rosemary, or sage for a fragrant twist.
- Simple Cinnamon Sweet Potatoes – Sprinkle a pinch of cinnamon before roasting for a naturally sweet, cozy flavor.
- Garlic-Free Version – Omit garlic for a gentle option suitable for sensitive days.
- Turmeric-Infused – Add ½ teaspoon turmeric and a dash of black pepper for a subtle anti-inflammatory boost.
- Plain & Crispy – Roast with just olive oil and salt to enjoy the natural sweetness and crisp edges.
- Maple Touch – Drizzle a small amount of maple syrup over the potatoes before roasting for a sweet-savory variation.
🥣 Freezing and Reheating
Honestly, I don't mind freezing these, though they can keep in the fridge for up to 4 days, if tolerated. The slices reheat well, so I purposefully use just a couple of sweet potatoes at a time when I make this recipe, as it can easily be halved or doubled for varying crowd sizes.
And if you know you absolutely must freeze your sweet potato slices once baked, make sure you use fresh veggies in the first place, then make sure to reheat them in the air fryer for 3-5 minutes at the highest temperature (the time depends on the amount you're reheating).
👨🏻🍳 Expert Notes & Tips
Freezing. These sweet potatoes freeze very well. I always keep some in my freezer, and I love adding a few slices to the pan during the last few minutes of cooking an omelet.
Serving & Pairing. These reabsorb oil and spices very well, and sometimes I'll fry some up along with pork belly & some spices (namely cumin, coriander, cardamom, cayenne, and ginger), especially when having the aforementioned omelet. This is one of my favorite quick & easy low histamine side dishes!
❓ What to Serve With Roasted Sweet Potatoes
🙋 Frequently Asked Questions
Yes — just increase the cooking time slightly and toss occasionally to ensure even browning.
What’s the best oil for low-histamine roasting?
Do I need to peel the sweet potatoes?
Can I make this recipe without garlic?
Have you tried this recipe?
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📖 Recipe
Simple Oven-Roasted Sweet Potatoes
Equipment
- oven
Ingredients
- 1-2 large organic sweet potatoes skin on
- 2-3 Tablespoons of organic olive oil
- sea salt & pepper to taste
- garlic optional
Instructions
- First, preheat your oven to 400°F (205°C).
- Then wash your sweet potatoes very carefully, scrubbing gently with your nails and removing any little sprouts on the spud (these are usually purple, but can also be white). Cut off any bruised or exposed parts where dirt may have gotten in, as you'll want to keep the skin on for this roasted sweet potato recipe. This isn't just because it's faster to prep the ingredients if you don't have to peel them, either, but because it makes for a much more enjoyable experience.
- Once the spuds are clean, slice them into thick, even slices, making the end pieces slightly larger. For a very large potato, make a slices a bit thinner (around 4mm), but for smaller taters make them 6-7mm thick.
- Arrange the slices one layer thick on your baking sheet, then drizzle the oil evenly across all the pieces. Don't worry about the bottom of each slice, as the oil will make its way under each piece as they cook. You can sprinkle sea salt and any spices you want on right now, or add salt later (but don't put any "raw" spices on the slices once they're cooked, or they'll taste bitter).
- Put the tray in the preheated oven and set the timer for 20 minutes. After 20 minutes, take out the tray and flip over each individual slice; they should be browned on the underside.
- While your sweet potatoes are baking, take out your garlic cloves and mince them.
- After the first 20 minutes of baking, add your minced garlic to the tray and bake for an additional 10 minutes, then take them out of the oven to cool. Add any additional salt & pepper now, and enjoy the sweet, soft potato inside each slice, and the chewy, caramelized outsides!
Notes
Nutrition
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Cynthia says
beautiful!! I rely on sweet potatoes a lot and so glad to find that they are low histamine
lowhistamineeats says
Same here!! It's a big part of my safe meals, especially because my low stomach acid still means that fruits & veg are the kindest on my tummy!