Preheat the oven to 220C, fan-forced. Thinly slice the onion. Cut the tomato into 1cm chunks.
Step 2 — Warm tortillas
Enclose the tortillas in foil (see Make it yours). Put in the oven for 8 mins or until softened and warmed through.
Step 3 — Cook beef filling
Meanwhile, heat 2 tsp olive oil in a medium frypan over medium heat. Cook the onion, stirring, for 3 mins or until softened. Increase the heat to high, add the beef mince and cook, breaking up the lumps with a spoon, for 3-4 mins until browned. Add the barbecue seasoning and 1 tbs barbecue sauce and cook, stirring, for 1 min or until fragrant. Remove the pan from the heat.
Step 4 — Dress spinach
Combine 1 tsp olive oil and 1 tsp red wine vinegar in a large bowl and season with salt and pepper. Add the spinach and toss to coat. Put 2 tbs mayonnaise and 2 tsp water in a separate bowl, season with salt and pepper and stir to combine.
Step 5 — Serve up
Divide the tortillas among plates. Top with the dressed spinach, beef filling and tomato. Drizzle with the mayonnaise mixture and enjoy!
Step 6 — Make it yours
Feel like crunchy tacos instead? Don't worry about pre-warming the tortillas, simply top them with the spinach and beef, then fold over to enclose. Bake for 10-12 mins until browned. Drizzle with the mayo, then scatter over the tomato to serve.