"This light vegan ceviche with hearts of palm, tomatoes, onion, and cilantro gets its spice from serrano peppers. You can serve it in a jar with chips or as a topping over tostadas. Even though you can eat the ceviche right away, it tastes best after it has been chilled for a couple of hours in the fridge. [Recipe originally submitted to Allrecipes.com.mx]"
Place hearts of palm slices in a glass bowl. Add tomatoes, onion, cilantro, and serrano peppers.
Measure 3/4 cup hearts of palm juice into a bowl; discard remaining juice. Mix vinegar and olive oil into the bowl. Pour over hearts of palm mixture. Season with oregano, salt, and pepper. Garnish with olives and avocado slices.