Vegetarian Fajitas – Easy Weeknight Dinner

Updated May 2026

Vegetarian fajitas with black beans are a healthy, protein-packed, and fibre-rich alternative to traditional Mexican wraps. This quick and colourful recipe is perfect for weeknight dinners, packed lunches, or even as a party snack.

These vegetable fajitas are loaded with fresh peppers, red onion, black beans, and tangy lime juice, topped with creamy avocado, grated cheddar, and a sprinkling of coriander. They are simple to make, take just 20 minutes, and everyone can customise their wrap with their favourite toppings.

Fajitas are also a great way to get kids eating a rainbow of vegetables and enjoying a balanced, satisfying meal.

Why You’ll Love These Vegetarian Fajitas

• Ready in just 20 minutes
• High in protein and fibre
• Quick, healthy weeknight dinner
• Vegetarian and easily vegan-adaptable
• Fun for families to assemble
• Fully customisable with toppings
• Balanced and colourful meal
• Easy to scale up for parties or batch cooking

Ingredients For Vegetarian Fajitas

For the fajita filling:

• 1 tablespoon olive oil
• 1 red onion, sliced
• 2 bell peppers, sliced
• 1 teaspoon dried oregano
• 1 teaspoon ground cumin
• 2 teaspoon smoked paprika
• 1 teaspoon mild chilli powder
• 400g black beans, cooked (canned works fine)
• Pinch of salt
• Juice of 1 lime

To serve:

• 8 small corn tortillas
• 2 small avocado, diced
• 200g sour cream
• 200g Cheddar cheese, grated
• Small bunch coriander, roughly chopped

Tip: Use 3 teaspoon fajita seasoning as a shortcut instead of individual spices.

Equipment Needed

• Chopping board
• Sharp knife
• Tablespoon & teaspoon
• Juicer
• Large frying pan or wok
• Cooking spoon or spatula
• Grater

How To Make Vegetarian Fajitas

Step 1 – Fry The Vegetables

Heat olive oil in a large frying pan or wok over medium heat. Add sliced peppers, onions, and spices. Stir fry for 5 minutes until vegetables soften and are fragrant.

Step 2 – Add The Black Beans

Stir in black beans and lime juice. Cook for 5–6 minutes until beans are warmed through. Sprinkle chopped coriander over the top.

Step 3 – Assemble The Fajitas

Warm the corn tortillas and spoon the vegetable and black bean mixture onto each tortilla. Top with diced avocado, sour cream, and grated cheddar.

Step 4 – Serve

Serve immediately as a satisfying lunch, dinner, or party wrap. Add extra toppings like black beans, sweetcorn, or sliced peppers to customise.

Tips For Perfect Vegetarian Fajitas

• Swap the beans – try butter beans, garbanzo beans, or lentils.
• Add halloumi – for a cheese twist, lightly fry halloumi cubes and add them to the filling.
• Skip the chilli – for milder fajitas.
• Batch prep – cook the vegetable mixture in advance and reheat for a super quick dinner.
• Tortilla hack – warm tortillas wrapped in a damp kitchen towel in the microwave for soft and pliable wraps.

What To Serve With Vegetarian Fajitas

• Potato wedges or sweet potato fries
• Nando’s style peas
• Ranch coleslaw
• Waffle nachos
• Homemade guacamole
• Halloumi fries
• Microwave Mexican rice or frozen mini corn cobs for busy nights