Combine all ingredients in a food processor (or a bowl and use an immersion blender). Blend on medium speed until the ingredients come together and the mixture is smooth. Taste to see if you need more salt, lime juice or cumin. Transfer avocado crema to a jar and keep covered while you prepare the rest.

Pour oil into a non stick pan and set over medium-high heat. Slice halloumi lengthwise into 4 thin pieces and place all in the pan (do it in batches if you have a smaller pan). Cook each slice for a few minutes or until it’s golden brown, then flip over and cook until the other side is deep golden too. Transfer to a plate.

Halve ciabatta loaf lengthwise then cut into 2, so you get 2 sandwiches. Take the first, open it and spread avocado crema over each inner side. Place some spinach on the bottom bread layer. Top it with 2 slices of halloumi, then 1-2 slices of tomato, then a few leaves of basil, more spinach and lastly cover it with the top half of ciabatta. Repeat with the other portion.

Serve, ideally with a side of leftover avocado crema and some tortilla chips. (And a drink, if you’re feeling it.)