Bonanza Chicken Monterey Recipe: Cheesy Baked Chicken with Peppers and Onions

This baked chicken dish brings together tender chicken, vibrant peppers, and onions under a blanket of melted cheese. I developed this recipe to capture the bold flavors of Southwest-inspired cooking with a restaurant-quality finish.

The beauty lies in its simplicity: a one-pan meal that bakes in 30 minutes while delivering complex flavors. Sweet peppers and onions soften beautifully under the cheese, creating a perfect balance with the savory chicken.

What emerges from the oven is a golden, bubbling casserole with melt-in-your-mouth chicken and a rich, cheesy topping. The colors alone make this dish as appealing to the eyes as it is to the palate.

Serve this straight from the oven for a hearty meal that feels special enough for company but simple enough for any weeknight. The flavors only deepen as it rests briefly before serving.

Ingredients for Bonanza Chicken Monterey

Pantry staples plus fresh peppers and onions make this cheesy baked chicken shine.

The chicken is the foundation here. Boneless, skinless breasts work best—pound them to even thickness so they cook uniformly. I grab mine from Costco for bulk savings, but any supermarket will do. The peppers? Any color you like (mix for visual pop). Trader Joe’s has great prices on organic bell peppers if you’re going that route.

No Monterey Jack? Pepper Jack adds a nice kick, or use all cheddar for a sharper flavor. Fresh out of cumin? Add an extra half-teaspoon of chili powder—it won’t be the same but still tasty. The tomatoes can be fresh if you’re feeling fancy, but canned saves time. San Marzano are my go-to for canned, but any brand works in a pinch.

This casserole reheats like a dream—tastes even better the next day. Keeps 4-5 days in the fridge, freezes for 3 months. Leftovers make killer lunch the next day (the cheese gets extra gooey).

Step-by-Step Instructions for Cheesy Baked Chicken with Peppers and Onions

Here’s the method that guarantees melty cheese and perfectly tender chicken every time.

Step 1: Season and Sear the Chicken

Pat the 1.5 lb Boneless, Skinless Chicken Breasts dry and pound to an even ½-inch thickness. Season both sides with the 1 tsp Salt, 0.5 tsp Black Pepper, 1 tsp Chili Powder, 0.5 tsp Ground Cumin, and 0.5 tsp Dried Oregano. These spices create that signature Southwest flavor.

Heat 1 tbsp Olive Oil in a large oven-safe skillet over medium-high heat. Sear the chicken for 3-4 minutes per side until golden brown. You want a good crust—this prevents the chicken from drying out during baking. Transfer to a plate and set aside.

Step 2: Sauté the Vegetables

In the same skillet, add the remaining 1 tbsp Olive Oil. Toss in the 1 whole Yellow Onion (thinly sliced) and 2 whole Bell Peppers (sliced into strips). Cook for 5-6 minutes until the onions soften and the peppers start to blister.

Add the 3 cloves Garlic Cloves (minced) and cook for 30 seconds until fragrant. Stir in the 1 can Canned Diced Tomatoes (undrained) and let it simmer for 2 minutes to meld the flavors. The liquid will help keep the chicken moist during baking.

Step 3: Assemble and Bake

Return the seared chicken to the skillet, nestling it into the pepper-onion mixture. Sprinkle the 2 cups Shredded Monterey Jack Cheese and 1 cup Shredded Cheddar Cheese evenly over the top. The combination of cheeses gives you that perfect gooey, melty texture.

Transfer the skillet to a preheated 375°F oven and bake for 15-20 minutes until the chicken reaches an internal temperature of 165°F and the cheese is bubbly and golden in spots. Keep an eye on it—the cheese can go from perfect to over-browned quickly.

Step 4: Rest and Garnish

Remove the skillet from the oven and let it rest for 5 minutes. This allows the juices to redistribute in the chicken and the cheese to set slightly. If you skip this, you’ll lose half your sauce to the plate.

Sprinkle with the 0.25 cup Fresh Cilantro (chopped) just before serving. The bright, fresh flavor cuts through the richness of the cheese and ties all the Southwest flavors together. Serve directly from the skillet for a rustic, hearty presentation.

Flavor Customization for This Recipe

Spice Level Boost

For more heat, add ½ tsp cayenne pepper to the spice mix or include 1 diced jalapeño with the peppers. This gives a subtle kick without overpowering the dish. I often do this when cooking for my BBQ team—they love the extra fire. 🌶️

Cheese Swap

Try Pepper Jack instead of Monterey Jack for spicy depth, or use Colby Jack for a milder option. For a smoky twist, mix in ½ cup smoked gouda with the other cheeses. Each brings a unique character to the dish.

Extra Veggies

Add 1 cup sliced mushrooms or 1 zucchini (diced) when sautéing the peppers. These absorb the flavors beautifully and add extra texture. I like to use cremini mushrooms for their meaty bite.

Protein Variations

Swap chicken for 1.5 lb pork tenderloin (sliced into medallions) or boneless chicken thighs for richer flavor. Thighs stay juicier than breasts during baking. Both options work great with the same seasonings.

For a vegetarian version, use extra-firm tofu pressed and cubed, or portobello mushroom caps as the base. 💡

Fresh Herb Swap

If cilantro isn’t your favorite, try ¼ cup chopped parsley or 2 tbsp fresh oregano as a garnish. These herbs complement the Southwest flavors while offering a different aromatic profile.

Frequently Asked Questions