Rainbow Fajita-Style Skillet: A High-Protein, One-Pan Dinner Bursting with Summer Flavor

A Rainbow of Veggies = Nutritious & Delicious!

If you’ve ever come home from the farmers market with bags full of colorful veggies and thought, “Now what?” This recipe is for you. My high-protein Rainbow Fajita-Style Skillet dinner is one of those simple, high-protein meals I keep on repeat all summer long. It’s full of vibrant color, takes just one pan, and brings bold flavor without a lot of effort.

It’s also incredibly flexible. Whether you’re cooking for a crowd or meal prepping for the week, this dish adapts to your schedule and your produce drawer!

Why You'll Love This Recipe

• High in Protein: With 2 pounds of chicken breast, this recipe delivers lean, satisfying protein to support muscle health, bone strength, and satiety.

• Nutrient-Packed Veggies:

  • Bell Peppers are rich in immune-boosting vitamin C and powerful antioxidants like beta-carotene.

  • Zucchini adds hydration, fiber, and vitamin B6, which supports brain health and energy metabolism.

  • Red Onions are not only flavorful but also offer prebiotics to support gut health and anti-inflammatory benefits.

• Quick & Easy: Done in about 30 minutes. You can even prep the veggies in advance to make weeknight cooking a breeze.

• Versatile: Enjoy it as-is, over grains like brown rice or quinoa, or wrapped in a tortilla. You can swap the protein (swap the chicken for lean steak strips or shelled shrimp, or try tofu or tempeh for a vegetarian option) or add extra veggies to suit your taste.

• Great for Meal Prep: This recipe makes six generous servings. It reheats beautifully for easy lunches or second dinners.

Farmer’s Market Veggie Add-In Ideas

In addition to bell peppers, zucchini, and onions, try adding:

• Corn kernels - (fresh or frozen) for a sweet pop of flavor and fiber.

• Cherry tomatoes - added at the end for juiciness and lycopene.

• Eggplant - which absorbs spices beautifully and adds texture.

• Mushrooms - for an earthy flavor and extra protein boost.

This is one of those dishes that lets you use what you’ve got while still delivering maximum flavor and nourishment.

This Rainbow Fajita-Style Skillet is a delicious way to use up summer veggies, add color to your plate, and fuel your body with protein and nutrients. It’s my favorite kind of recipe: fast, flavorful, and forgiving. Whether you're feeding your family or just yourself, you’ll want to keep this one in rotation all summer long!

One-Skillet Cooking = Easy Clean Up!

Storage & Meal Prep Tips

• Prep Ahead: Slice veggies in advance and store in an airtight container in the fridge for 3–4 days.

• Leftovers: Store cooked leftovers in the fridge for 2–3 days. Reheat in the microwave or on the stovetop.

• Freezer Tip: Cooked portions freeze well too; just portion into freezer-safe containers for easy dinners later.

Ingredients

Protein & Veggies:

• 2 tbsp olive oil (divided)

• 2 lbs boneless, skinless chicken breast, sliced

• 1 red bell pepper, sliced

• 1 orange bell pepper, sliced

• 1 green bell pepper, sliced

• 1 zucchini (yellow or green), sliced

• 1 large red onion, sliced

Fajita Spice Blend:

• 1 tsp garlic powder

• 1 tbsp chili powder

• 1 tsp oregano

• 1 tsp smoked paprika

• 1 tsp ground cumin

• ½ tsp onion powder

• 1 tsp salt

• ½ tsp black pepper

Optional for Serving:

• 2 cups cooked quinoa or brown rice

• Whole wheat tortillas

• Toppings: sliced avocado, fresh cilantro, salsa, or lime wedges

Directions

1. Make the Spice Blend: Mix up all the spices in a small bowl.

2. Season the Chicken: Coat the sliced chicken breast with half the spice blend.

3. Cook the Chicken: Heat 1 tbsp olive oil in a large skillet over medium-high heat. Add chicken and cook for about 5–6 minutes until fully cooked. Remove from the pan and set aside.

4. Sauté the Veggies: Add the remaining olive oil to the skillet. Toss in all the sliced veggies and cook for about 5 minutes, until tender-crisp.

5. Add Flavor: Sprinkle the remaining spice blend over the veggies. Stir to coat evenly.

6. Combine & Finish: Return the chicken to the skillet. Mix everything together and cook for another 3–4 minutes until heated through.

7. Serve & Enjoy: Spoon over grains, wrap in tortillas, or eat straight from the pan. Top with avocado or salsa if you like!