These Air Fryer Roasted Cherry Tomatoes & Onions are bursting with sweet, caramelized flavor and ready in just 15 minutes. Roasting in the air fryer intensifies the natural sweetness of the tomatoes while creating perfectly tender onions with lightly crispy edges. This versatile side dish is delicious with grilled meats, pasta, salads, toast, pizza, or grain bowls.

Recipe Overview

Ingredients

Main Ingredients

• 2 cups cherry tomatoes
• 1 medium red onion, cut into wedges or thick slices
• 2 tablespoons extra virgin olive oil
• 3 cloves garlic, minced
• 1 teaspoon Italian seasoning
• ½ teaspoon dried oregano
• ½ teaspoon smoked paprika (optional)
• ½ teaspoon sea salt
• ¼ teaspoon freshly ground black pepper

Optional Garnishes

• Fresh basil leaves
• Fresh parsley, chopped
• Grated Parmesan cheese
• Crumbled feta cheese
• Balsamic glaze
• Crushed red pepper flakes

Equipment Needed

• Air fryer
• Large mixing bowl
• Tongs or spatula

Instructions

Step 1: Prepare the Vegetables

Wash and dry the cherry tomatoes.

Slice the onion into thick wedges or rings.

Place both in a large mixing bowl.

Step 2: Season

Add:

• Olive oil
• Minced garlic
• Italian seasoning
• Oregano
• Smoked paprika (if using)
• Salt
• Black pepper

Toss until everything is evenly coated.

Step 3: Preheat the Air Fryer

Preheat the air fryer to 380°F (193°C) for 3 minutes.

Step 4: Air Fry

Arrange the tomatoes and onions in a single layer in the air fryer basket.

Cook at 380°F (193°C) for 10–12 minutes, shaking the basket halfway through.

The tomatoes should be blistered and juicy, while the onions should be tender with lightly caramelized edges.

Step 5: Garnish and Serve

Transfer to a serving dish.

Finish with:

• Fresh basil or parsley
• Parmesan or feta cheese (optional)
• A drizzle of balsamic glaze
• Crushed red pepper flakes for a little heat

Serve warm.

Tips for Perfect Air Fryer Roasted Tomatoes & Onions

Use Similar-Sized Tomatoes

This helps them cook evenly.

Don’t Overcrowd the Basket

Cook in batches if necessary so the vegetables roast instead of steam.

Shake Halfway Through

This ensures even browning and caramelization.

Add Fresh Herbs After Cooking

Fresh herbs retain their flavor and vibrant color when added just before serving.

Flavor Variations

Mediterranean

Add:

• Kalamata olives
• Crumbled feta
• Fresh oregano

Garlic Butter

Replace the olive oil with melted garlic butter for a richer flavor.

Balsamic Herb

Toss the vegetables with 1 tablespoon balsamic vinegar before cooking and finish with balsamic glaze.

Spicy Italian

Add:

• ½ teaspoon crushed red pepper flakes
• A pinch of cayenne pepper

Parmesan Roasted

Sprinkle grated Parmesan over the vegetables during the last 2 minutes of cooking.

What to Serve With

Main Dishes

• Air fryer chicken breasts
• Grilled steak
• Baked salmon
• Pork chops
• Italian meatballs

Pasta

• Spaghetti
• Penne
• Fettuccine
• Ravioli

Bread

• Garlic bread
• Bruschetta
• Toasted sourdough
• Focaccia

Grain Bowls

• Quinoa
• Brown rice
• Couscous
• Farro

Storage Instructions

Refrigerator

Store leftovers in an airtight container for up to 4 days.

Freezer

Not recommended, as the tomatoes become very soft after thawing.

Reheating

Air Fryer

Reheat at 350°F (175°C) for 2–3 minutes.

Skillet

Warm over medium heat for 3–4 minutes.

Microwave

Heat in 30-second intervals until warmed through.

Nutrition Information (Per Serving)

Frequently Asked Questions

Can I use grape tomatoes?

Yes. Grape tomatoes work just as well and may hold their shape slightly better than cherry tomatoes.

Can I use white or yellow onions?

Absolutely. White, yellow, or sweet onions all roast beautifully and provide slightly different flavor profiles.

Why are my vegetables steaming instead of roasting?

The basket may be overcrowded. Arrange the vegetables in a single layer or cook in batches for the best caramelization.

Can I make this recipe ahead of time?

Yes. Roast the vegetables and refrigerate them for up to 4 days. Reheat in the air fryer before serving.

Can I add other vegetables?

Definitely! Zucchini, bell peppers, mushrooms, asparagus, or broccoli pair wonderfully with the tomatoes and onions.

Recipe Notes

✅ Ready in under 20 minutes

✅ Naturally gluten-free

✅ Vegan-friendly

✅ Mediterranean-inspired

✅ Perfect for meal prep

Make-Ahead Tip

Season the tomatoes and onions several hours ahead and refrigerate them. Air fry just before serving for the freshest flavor and best texture.

Serving Suggestion

Spoon the roasted tomatoes and onions over grilled chicken, steak, fish, pasta, creamy polenta, or toasted sourdough. They also make a flavorful topping for omelets, pizza, or grain bowls.

Chef’s Secret

For the sweetest, most flavorful tomatoes, choose ripe cherry tomatoes and avoid overcrowding the air fryer basket. Once cooked, drizzle with a little extra virgin olive oil and balsamic glaze, then finish with torn fresh basil and flaky sea salt. The warm tomato juices create an incredible sauce that’s perfect for soaking up with crusty bread.