Smoky Cajun-spiced prawns over fluffy quinoa with a fresh mango and lime salsa, avocado and sweetcorn. The homemade spice mix keeps the salt down, and the prawns cook in about 3 minutes.

A bowl has about 30g of protein and 9g of fibre for 436 calories, including the quinoa, avocado and sweetcorn. Prawns are very lean, with less than 1g of fat per 100g, so most of the fat here comes from the avocado and olive oil.
Why quinoa. Quinoa has more protein than rice and contains all nine essential amino acids, which is rare for a plant food. Rinse it before cooking to remove its natural bitter coating.
A homemade Cajun mix. Shop-bought Cajun seasoning often contains a lot of salt. Making your own from paprika, garlic powder, oregano and cayenne lets you use just a quarter teaspoon of salt for four bowls.
Food safety. Defrost frozen prawns in the fridge overnight, or in a sealed bag under cold running water, never at room temperature. Cook raw prawns until they are pink all over and opaque in the middle.
The mango salsa adds vitamin C, which helps the body absorb iron from the quinoa. For another prawn dinner, try the garlic prawn and spinach stir-fry, or for a fish bowl, the salmon poke bowl.