You know those nights when you need something healthy but just can’t face another salad? That’s when my spinach onion boil saves the day. It’s my go-to when I’m racing against the clock but still want a vegetable-packed dish that actually satisfies. Spinach gives you that iron boost while onions add natural sweetness, and together they create this magic quick-cooking combo that’s ready in under 25 minutes from fridge to table.
I first discovered this simple preparation when my neighbor brought over a steaming bowl after my twins were born. “Eat this, it’s what kept me standing through three kids,” she said with a wink. Fifteen years later, I still make her spinach onion boil weekly, though I’ve tweaked it with my favorite olive oil and extra black pepper. The beauty is how the onions soften into silk while the spinach holds just enough texture. It’s comfort food that doesn’t weigh you down, exactly what busy nights call for.
Why You’ll Love This Spinach Onion Boil
This dish has become my kitchen superhero for so many reasons:
- Weeknight magic: From chopping to serving, it’s done in under 25 minutes (I’ve timed it between homework help and soccer practice!)
- Nutrition powerhouse: Spinach packs iron and vitamins while onions add gut-friendly prebiotics – sneaky health benefits in every bite
- Adapts to anything: Serve it hot as a side, toss with pasta, or top with a fried egg for a complete meal
- Pantry-friendly: Just five basic ingredients you likely have right now
Spinach Onion Boil
Ingredients
Equipment
Method
- Heat olive oil in a large pot over medium heat.
- Add the sliced onions and sauté until they are soft and translucent, about 5 minutes.
- Add the spinach to the pot in batches, stirring until wilted.
- Season with salt and black pepper and stir well.
- Cover and let simmer for 5 minutes.
Notes
Ingredients for Spinach Onion Boil
Here’s the beautiful simplicity of this dish – just five ingredients doing all the heavy lifting:
- 1 lb fresh spinach (washed well, stems trimmed – trust me, the fresh stuff makes all the difference)
- 1 large onion (thinly sliced – I like yellow for sweetness, but red works too if you want more bite)
- 2 tbsp olive oil (my Greek grandmother would haunt me if I used anything less than extra virgin)
- 1 tsp salt (start with this, you can always add more later)
- ½ tsp black pepper (freshly cracked if you’re feeling fancy)
Equipment Needed
Grab these trusty tools from your kitchen:
- Large pot (big enough to hold all that spinach as it wilts down)
- Wooden spoon (my favorite for stirring without scratching the pot)
How to Make Spinach Onion Boil
Okay, let’s get cooking! This method is so simple you’ll memorize it after one try, but I’ll walk you through each step like I’m right there in your kitchen with you.
Step 1: Sauté the Onions
First, heat that glorious olive oil in your pot over medium heat, not too hot or the onions will burn before they soften. Add your sliced onions and stir them around until they turn beautifully translucent, about 5 minutes. You’ll know they’re ready when they smell sweet and look like little golden ribbons. Don’t rush this step, those softened onions are the flavor foundation of the whole dish!
Step 2: Wilt the Spinach
Now the fun part! Add handfuls of spinach gradually, I usually do it in 3 batches. The first mound will look overwhelming, but watch how it magically shrinks as you stir! Once it wilts down (about 1 minute), add more. This prevents overcrowding and ensures even cooking. The spinach should look bright green and just tender, not mushy.
Step 3: Season and Simmer
Time to wake up those flavors! Sprinkle in your salt and pepper, give everything a good stir, then cover the pot. Let it simmer gently for 5 minutes, this melds all the flavors together perfectly. Lift the lid once to stir and check consistency. You want the spinach silky but still holding some shape. And voila, your spinach onion boil is ready to delight!
Tips for Perfect Spinach Onion Boil
After making this dish weekly for years, here are my can’t-live-without tips:
- Fresh is best: That pre-washed bagged spinach? Fine in a pinch, but fresh bunches give better texture and flavor, just wash well to avoid grit!
- Salt smart: Start with 1 tsp, then taste after simmering. Spinach absorbs salt differently depending on freshness.
- Garlic boost: Toss in 2 minced cloves with the onions if you want extra aroma (my husband insists on this version).
Spinach Onion Boil Variations
This recipe is like my favorite little black dress, perfect as-is but easy to dress up! Here are my go-to twists:
- Keto kick: Crumble in turkey bacon with the onions, that smoky saltiness takes it next level (my gym buddy’s favorite version)
- Bright & light: Squeeze fresh lemon juice at the end for a low-calorie zing that cuts through the richness
- Creamy dream: Stir in a splash of coconut milk during the simmer for a dairy-free lushness
Serving Suggestions
This spinach onion boil plays well with others! I love it spooned over steaming rice for a simple meal, or alongside grilled chicken for extra protein. Sometimes I just grab a fork and eat it straight from the pot, no shame in my veggie-loving game!
Storage and Reheating
This spinach onion boil keeps beautifully in the fridge for up to 3 days, just pop it in an airtight container. When reheating, I splash in a tablespoon of water and warm it gently on the stove. Microwaving works too, but stir halfway to prevent hot spots!
Spinach Onion Boil Nutrition
Here’s the best part, this dish packs nutrition without guilt! One serving (about 1 cup) gives you roughly:
- 80 calories, light enough for seconds!
- 5g healthy fats (thank you, olive oil)
- 3g plant-based protein, not bad for veggies!
*Values are estimates based on my kitchen scale and calculator, your exact amounts may vary slightly depending on spinach bunch size and onion sweetness.
Spinach Onion Boil FAQs
Can I use frozen spinach instead of fresh?
Absolutely! Swap in a 10-oz block of frozen spinach, thawed and squeezed dry. Just know it’ll be softer than fresh, I like to add it at the very end and just heat through.
How can I make this lower in sodium?
Easy! Start with half the salt, then finish with a squeeze of lemon instead. The acidity brightens everything up so you won’t miss the salt. My cardiologist-approved trick!
Is this spinach onion boil keto-friendly?
You bet! With just 6g net carbs per serving, it fits keto perfectly. For extra fat and flavor, stir in some crumbled turkey bacon with those onions, my keto friends go wild for that version.
If you are looking for other simple vegetable side dishes, check out recipesloop.com for more inspiration.
Did You Make This Recipe?
If you tried this spinach onion boil, I’d love to hear how it turned out! Drop a comment below or tag me in your kitchen creations, your feedback makes my day.

