At 3-a-piece, these tacos make a filling and comforting vegetarian dinner. The addition of the marinated onions adds a lip-smackingly tasty tang, and the watercress adds peppery crunch.
Start with the onions. Add the sliced onions to a small bowl. Sprinkle over the salt and pour over the red wine vinegar. Put to one side for 15 minutes, giving it a stir a couple of times.
Add the cannellini and kidney beans to a saucepan, along with the passata, smoked paprika, garlic powder, salt, white pepper, sugar and sriracha. Stir together and heat through on a medium heat for 10-12 minutes, stirring often and giving the beans a gentle squash with a fork a few times. Turn off the heat.
Now come back to the onions. Add the olive oil and dried oregano and stir together.
To assemble the tacos, place the warmed tacos on plates. Spoon the bean mixture in the middle. Sprinkle on the avocado chunks and crumbled feta. Use a fork to remove the onions from the marinade and add the onions to the tacos. Top the tacos with the watercress.
Serve immediately. You can also drizzle on a little of the onion-oil marinade if you like.
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Notes
Nutritional info is approximate per taco
***This presumes approx. half (3 tablespoons) of the oil will be left behind when adding the marinated onions.***