Steak Quesadilla with Fajita Vegetables | CookOS

Steak Quesadilla

Name: Steak Quesadilla with Fajita Vegetables
Prep time: 10 min
Cook time: 15 min
Total time: 25 min
Yield: 1 servings
Cuisine: Tex-Mex
Ingredients: 6 oz sirloin steak, cooked and cubed; 1 tbsp cilantro, chopped; 1 large flour tortilla; 60 g low-fat mozzarella cheese, shredded; 1/4 green bell pepper, sliced; 1/4 red onion, sliced; 1 tbsp low-fat mozzarella cheese, shredded (optional); cooking spray, to coat pan; chipotle vinaigrette, for serving; sour cream, for serving

A Tex-Mex steak quesadilla filled with cubed sirloin, fajita vegetables, and melted mozzarella cheese in a toasted flour tortilla. This quick homemade version rivals restaurant versions and comes together in under 15 minutes.

🍴Copycat

🌍Tex-Mex 🏷️Quesadilla 🏷️Steak quesadilla 🏷️Cheesy 🏷️Steak

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Total

25 min

Servings

Difficulty

Easy

Est. Cost

$20–$33

Recipe Source

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Ingredients

6 oz sirloin steak, cooked and cubed
1 tbsp cilantro, chopped
1 large flour tortilla
60 g low-fat mozzarella cheese, shredded
1/4 green bell pepper, sliced
1/4 red onion, sliced
1 tbsp low-fat mozzarella cheese, shredded (optional)optional
cooking spray, to coat pan
chipotle vinaigrette, for servingoptional
sour cream, for servingoptional

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Instructions

1
Cook steak in a pan until done to your liking. Let it rest, then dice into cubes and toss with chopped cilantro.
2
In a separate pan, sauté the sliced green bell pepper and red onion until softened.
3
Lay the tortilla flat. On one half, layer the shredded mozzarella, followed by the diced steak and sautéed vegetables.
4
Sprinkle with extra cheese if desired.
5
Fold the empty half of the tortilla over the fillings, then fold in the sides to create a rectangular shape.
6
Place the quesadilla in a lightly oiled pan over medium heat. Toast on both sides until golden brown and the cheese is fully melted, about 2-3 minutes per side. Use a press for an even sear.
7
Remove from the pan, slice in half, and serve with chipotle vinaigrette, optionally mixed with sour cream.

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Tips & Notes

Pro tips

Cube the steak into small, uniform pieces so it distributes evenly and heats through quickly without overcooking.
Use medium heat and cooking spray to prevent the tortilla from burning before the cheese melts—high heat browns the outside before the interior warms.
Don't overfill: pile ingredients on one half of the tortilla only, then fold in half for even cooking and easier flipping.
Rest the finished quesadilla for 1–2 minutes before cutting—this helps the cheese set and prevents a messy bite.

Substitutions

Sirloin steak → flank steak or skirt steak (more tender, better for fajita-style cuts)
Mozzarella → Monterey Jack or low-moisture cheddar (melts similarly with better flavor depth)
Flour tortilla → large corn tortilla (crispier, more authentic; may tear if too thin)
Green bell pepper + red onion → pre-made fajita vegetable mix (convenience; slightly less fresh flavor)

Storage & make-ahead

Store leftover quesadilla in an airtight container in the fridge up to 2 days. Reheat in a skillet over medium heat for 2–3 minutes per side to restore crispiness, or wrap in foil and warm in a 350°F oven for 5 minutes.

Common Questions

What type of steak works best for quesadillas?

Sirloin steak is ideal—it's tender, flavorful, and affordable. Cook it to medium-rare or medium, then cube it so it distributes evenly throughout the tortilla.

Can I make steak quesadillas ahead of time?

Cook the steak and slice vegetables in advance and refrigerate up to 2 days. Assemble and cook the quesadilla fresh for the crispiest result.

Should I cook the vegetables before adding them to the quesadilla?

Slicing the peppers and onions raw works fine—they soften in the pan as the tortilla toasts. For softer vegetables, sauté them for 2–3 minutes first.

What cheese can I substitute for mozzarella?

Monterey Jack, Oaxaca, or cheddar work well. Avoid fresh mozzarella, which can release excess moisture; use low-moisture varieties or pre-shredded cheese.