This one-pan Italian simmer brings together tender chicken, sweet peppers, and onions in a rich tomato sauce with minimal effort. The dish captures the essence of rustic Italian cooking.
By the end, you’ll have a hearty, flavorful meal that’s perfect for any weeknight. The sauce thickens beautifully as the chicken cooks, creating a cohesive, satisfying dish.
Ingredients for Chicken Peppers Onions Tomato Sauce
Pantry staples and fresh produce make this dish shine with minimal fuss.
| Ingredient | Amount | Notes |
|---|---|---|
| Chicken Thighs 🍗 | 1 ½ lb | Boneless, skinless preferred |
| Bell Peppers 🌶️ | 2 whole | Any color, sliced into strips |
| Yellow Onion 🧅 | 1 whole | Large, thinly sliced |
| Garlic Cloves 🧄 | 4 cloves | Minced for depth of flavor |
| Canned Crushed Tomatoes 🍅 | 28 oz | San Marzano preferred |
| Tomato Paste 🍅 | 2 tbsp | For concentrated flavor |
| Dry Red Wine 🍷 | ½ cup | Any bold, dry variety |
| Chicken Broth 🥣 | 1 cup | Low-sodium preferred |
| Dried Oregano 🌿 | 1 tsp | Crushed between fingers |
| Dried Basil 🍃 | 1 tsp | Or use 1 tbsp fresh |
| Red Pepper Flakes 🔥 | ½ tsp | Adjust to taste for heat |
| Olive Oil 🫒 | 2 tbsp | Extra-virgin for richness |
| Kosher Salt 🧂 | 1 tsp | Diamond Crystal preferred |
| Black Pepper 🌶️ | ½ tsp | Freshly ground preferred |
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The chicken is the star here. Thighs stay juicier than breasts during the long simmer. I grab mine from Whole Foods or the butcher counter at Kroger—look for skinless, boneless to save time. Bell peppers should be firm and glossy; any color works (red adds sweetness, green brings bite). If you’re short on time, pre-sliced peppers from the salad bar are a lifesaver (no judgment).
No wine? Substitute with extra broth and a splash of balsamic vinegar. Fresh herbs can replace dried—use three times the amount. The tomato paste is non-negotiable for depth, but those squeeze tubes at Trader Joe’s mean no waste. If you’re out of crushed tomatoes, whole canned tomatoes crushed by hand work just as well. The sauce thickens as it cooks, so don’t worry if it looks thin at first.
This tastes even better the next day once flavors meld. Stores 4-5 days in the fridge, freezes beautifully for 3 months. I always double the batch—leftovers make the best sandwiches or pasta toppers.
Why You’ll Love This Recipe
- One Pan Meal: I toss everything in, let it simmer, and clean up is just one pot.
- Rich Tomato Depth: The crushed tomatoes and garlic melt together into this warm, hearty sauce that soaks into the chicken.
- Feeds Everyone: I make a big batch and it’s just as good for meal prep lunches as it is for a Sunday dinner.
- Budget Stretcher: Chicken thighs and canned tomatoes keep it affordable, and it tastes like I spent hours.
Step-by-Step Instructions for Chicken Peppers Onions Tomato Sauce
One pan, simple steps, and big Italian flavors coming right up.
Step 1: Sear the Chicken Thighs
Heat the 2 tbsp olive oil in a large Dutch oven or heavy pot over medium-high heat. Pat the 1.5 lb chicken thighs dry with paper towels, then season both sides with the 1 tsp kosher salt and 0.5 tsp black pepper.
Add the chicken to the hot oil and sear for 4-5 minutes per side until golden brown and crispy. Don’t crowd the pan—work in batches if needed. Transfer the seared chicken to a plate and set aside.
Step 2: Sauté the Vegetables
In the same pot, add the 2 whole bell peppers (sliced into strips) and 1 whole yellow onion (thinly sliced). Cook over medium heat for 5-6 minutes until the onions soften and the peppers begin to blister.
Add the 4 cloves garlic cloves (minced) and cook for 30 seconds until fragrant. Stir in the 2 tbsp tomato paste and cook for 1 minute, allowing it to deepen in color. This builds a rich base for your sauce.
Step 3: Deglaze and Simmer
Pour in the 0.5 cup dry red wine and scrape the bottom of the pot to release all the browned bits. Let it simmer for 2-3 minutes until the liquid reduces by half. This step adds depth and balances the acidity of the tomatoes.
Stir in the 28 oz canned crushed tomatoes, 1 cup chicken broth, 1 tsp dried oregano, 1 tsp dried basil, and 0.5 tsp red pepper flakes. Return the chicken to the pot, along with any accumulated juices.
Step 4: Finish the Dish
Bring the mixture to a gentle simmer, then reduce the heat to low. Cover and let it cook for 25-30 minutes, stirring occasionally, until the chicken is tender and the flavors meld together.
Uncover and simmer for an additional 5-10 minutes if the sauce is too thin. Taste and adjust seasoning if needed. The sauce should be thick enough to coat the back of a spoon, and the chicken should be fall-apart tender.
Pro Tips For Making Chicken Peppers Onions Tomato Sauce
- Brown the Chicken First: Sear the chicken thighs skin-side down in a hot pan for 5-6 minutes until golden—this builds flavor that simmers into the sauce later. I learned this the hard way when my early versions tasted flat.
- Slice Peppers Thin: Cut the bell peppers into ¼-inch strips so they soften quickly in the sauce. Thick slices stay crunchy and uneven, no matter how long you cook them.
- Deglaze the Pan: After browning the chicken, pour in a splash of water or broth and scrape up those browned bits before adding tomatoes. Sounds weird, but it works: that’s where half your flavor hides.
- Use Fire-Roasted Tomatoes: Swap regular crushed tomatoes for fire-roasted—they add a smoky depth that pairs perfectly with the peppers and onions. My grandmother swore by this, and she was right.
Dietary Considerations for This Dish
Gluten-Free Friendly
This dish is naturally gluten-free as written, since it relies on whole ingredients like chicken, peppers, and tomatoes. Just double-check your chicken broth and canned tomatoes for hidden gluten—some brands add thickeners. I always use San Marzano for peace of mind. 💪
Dairy-Free Adaptation
There’s no dairy in this recipe, so it’s perfect for anyone avoiding lactose. If you’d like to add creaminess, stir in ½ cup coconut milk at the end for a rich, dairy-free finish. This works especially well if you want a slightly sweeter profile.
Low-Carb Option
To reduce carbs, simply cut the bell peppers in half—use 1 instead of 2—and skip the wine. The tomato sauce still provides plenty of flavor. I’ve made it this way for keto friends, and they rave about it. ✨
Vegetarian Swap
Replace the chicken with 1.5 lb chickpeas (drained and rinsed) or portobello mushrooms (sliced into chunks). Sear the mushrooms first for a meaty texture. The rest of the recipe stays the same, and it’s just as hearty.
Allergen Notes
The only common allergen here is garlic for some folks. To omit it, use 1 tbsp garlic powder instead. Also, ensure your chicken broth is free of soy or other allergens if that’s a concern.
Nutrition Facts
Frequently Asked Questions
Can I use chicken breasts instead of thighs?
You can, but thighs stay juicier during the 30-minute simmer. If using breasts, reduce cooking time to 20 minutes to prevent dryness. Always check internal temperature reaches 165°F before serving.
What if I don’t have red wine?
Substitute with extra chicken broth and 1 tbsp balsamic vinegar for similar depth. The acidity balances the tomatoes beautifully. Avoid white wine—it won’t add the same richness.
Can I make this ahead?
The flavors meld even better overnight. Store in an airtight container for up to 4-5 days in the fridge or freeze for 3 months. Reheat gently on the stove.
Why is my sauce too thin?
Uncover and simmer for an extra 5-10 minutes to thicken. If still thin, mix 1 tsp cornstarch with water and stir in. The sauce should coat the back of a spoon when ready.
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