In a large bowl, whisk to combine the vinegar, water, salt, oregano, and crushed red peppers. Add the cabbage slaw and the onions. Using tongs, combine the slaw well with the simple dressing. Cover and refrigerate for 30 minutes to 1 hour.
Prep:
Cook the rice according to package directions or, make the easy Spanish rice in the notes.
Preheat the oven to 350F. Once heated, warm up the pupusas for 10 to 15 minutes, depending on their size.
Assemble the rice bowls:
Divide the cooked rice into 4 bowls. Top with a generous serving of curtido slaw, shredded lettuce, salsa, and guacamole. Squeeze 1 to 2 lime wedges over each bowl.
Serve the rice bowls with the warm pupusas.
Notes
Swap the slaw mix for about ½ head of cabbage, finely shredded & 1 large carrot, grated.
Swap the boxed Spanish rice for 1 ½ cups white rice cooked in 3 cups of water with ½ teaspoon of paprika, ½ teaspoon of garlic powder, 1 teaspoon cumin, ½ teaspoon salt, 1 ½ tablespoons tomato paste.