Avocado toast is a type of open sandwich consisting of toast with mashed avocado, and any of a variety of spices and flavorful ingredients. the most popular are usually salt and black pepper, sometimes lemon juice or other citrus, while others include olive oil, hummus, vinegar, red pepper flakes, feta, duqqa and tomato. avocado toast became a food trend of the 2010s. it has appeared on café menus since at least the 1990s. following avocado toast's elevation to trend status, the act of ordering avocado toast at a café was criticized as a symbol of frivolous spending.

Source: Wikipedia