Its just five simple ingredients.

For the best flavor (and why wouldnt you want the best flavor?!

), leave your tomatoes out on the counter,upside down, until ready to eat.

3-ingredient tomato sandwich (open-faced) on a plate

Simply Recipes / Emma Christensen

Dont refrigerate themunless theyre already at peak ripenessand you wont be able to eat them within a few days.

Top with the cheese, followed by a layer of basil leaves.

Arrange the sliced avocado over the basil, and then your tomato slices.

3-ingredient tomato sandwich (open-faced) on a plate

Simply Recipes / Emma Christensen

Finish with a sprinkle of salt over top.

But Ive swapped in fresh mozzarella, Monterey Jack, Colby, and even cream cheese.

Arugula is also fantastic in place of basilit adds a similar peppery, spicy flavor and some crunchiness.

But you could skip it, or swap it for another filling ingredient like sliced hard-boiled eggs.

The tomatoes are the one non-negotiable here.

This sandwichand summer days in generaljust wouldnt be the same without them.