For an overall inexpensive way of transforming avocado toast into a more substantial and balanced meal, add canned fish, which offers a unique taste and numerous health benefits.

While you can experiment with varieties of fish like salmon and tuna, the best canned fish to add is arguably sardines, which will add a pleasant umami flavor to your meal.

They'll taste mildly fishy, and depending on how they are prepared, they can also be salty or smoky. The buttery creaminess of the avocado will balance out the briny taste.

Sardines, in particular, are not only a great source of protein, but also have plenty of omega-3 fatty acids to support your brain, skin, heart, and immune health.