How to Dice Roma Tomatoes

Looking for a more efficient way to dice your Roma tomatoes? We hear you; if you are here, you probably know by now that there is a right and a wrong way when it comes to dicing. For years you may have been wasting precious time when dicing tomatoes, but you’ll soon discover the process can be a lot faster. So if you’ve been wondering how to dice Roma tomatoes, continue reading to find all your answers.

Tomatoes are one of those staple veggies that go well with nearly every recipe. In addition to its yummy taste, tomatoes happen to be the major dietary source of the antioxidant lycopene, which has been linked to many health benefits, including reduced risk of heart disease and cancer. They are also a great source of vitamin C, potassium, folate, and vitamin K.

As good as tomatoes are, dicing tomatoes is a whole other situation. Dicing takes a bit of practice, so don’t get discouraged if, at first, you find it a little troublesome. That said, dicing Roma tomatoes doesn’t have to be a pain when you utilize the right technique and the right tools. So if you are thinking about dicing tomatoes for your next tomato paste, find out the right ways to dice Roma tomatoes.

 Roma Tomatoes FAQ’s

What is a Roma tomato?

A Roma tomato, also known as a plum tomato, is a paste tomato. Paste tomatoes, like Roma tomatoes, generally have a thicker fruit wall, fewer seeds, and a denser but more grainy flesh. Roma tomatoes tend to be oblong in shape and heavy for their size.
They also tend to be more firm than a non-Roma or paste tomato. Roma tomatoes ripen at one time rather than continue through the season. While they can be eaten raw, they are at their best when they are cooked.

How to grow Roma tomatoes?

All tomatoes need plenty of water, soil rich in organic material, and need to be staked up off the ground for the best fruit production. Roma tomatoes are not the exception.

  • Prepare the soil of your tomato bed by adding compost or a slow-release fertilizer.
  • Once you plant your Roma tomato plants, water them at least once a week.
  • Once your Roma tomato plants are 6-12 inches (15 to 30.5 cm.) high, start staking the Roma tomatoes up off the ground.

When is a Roma tomato ripe?

When dealing with Roma tomatoes, your safest bet to know if these are ripe is to focus on their color. Once the tomato is red all the way from the bottom to the top, it is ready for picking.

What is the difference between dicing other tomatoes and Roma tomatoes?

Like a Roma, dicing an oblong tomato doesn’t require you to core the tomato before setting up the dice.

Is there a special knife for dicing tomatoes?

Actually, a tomato knife is specially designed to tackle the thin skins and fragile insides of tomatoes. They are typically serrated, which allows the knife to move through the skin quickly and with minimal pressure.

Is it ok to use any serrated knife?

While serrated knives tend to cut tomatoes better than a plain edge knife (unless it is super sharp), not all serrated knives will do the trick. For instance, steak knives and other general use knives tend to be too thick to execute a paper-thin tomato slice.

What is the best knife to dice tomatoes?

Here is an excellent option:

ZYLISS Serrated Paring Knife

How to Dice Roma Tomatoes: ZYLISS Serrated Paring Knife

A serrated paring knife perfectly controls the cutting and slicing of tomatoes, bread, and vegetables. Features high-carbon stainless steel blade retains super sharp edge and easily re-sharpens for long-lasting use.

It comes with an ergonomic handle with a soft-touch rubber grip, reducing hand fatigue and allowing precision and control. Safety blade guard protects the knife for travel and storage when camping or tailgating.


  • Superior quality Japanese steel
  • Dishwasher safe
  • Hand wash recommended
  • Soft-touch

How to dice Roma Tomatoes

Method 1

  1. Secure your cutting board by placing a wet paper towel underneath.
  2. Insert a paring knife at an angle to remove the stem. A tomato shark also works.
  3. Roma tomato has a central seed pod. Remove the seed pod
  4. Cut the slices in half again
  5. Alternatively, you can use a pairing knife by quartering the tomato and remove the seed pod.
  6. Using a sharp knife, slice and then dice the tomatoes.
  7. For more efficiency, make one motion all at once

Method 2

  1. Begin with a clean, firm Roma tomato.
  2. Cut the tomato in half lengthwise.
  3. Turn the tomato halves cut-side down to anchor them, then make several vertical slices in each tomato.
  4. Rotate the slices 90 degrees and slice downward in the opposite direction to create a dice.
  5. Repeat with as many tomatoes as you need.

Method 3

  1. Remove any stems by cutting off the top of the tomato.
  2. Cut the tomato in half length-wise.
  3. Place the tomato halves cut-side down for stability.
  4. Make vertical, evenly spaced slices in each tomato. Choose to cut thick or thin strips based on how small or large you want the dice to be.
  5. Rotate the slices 90 degrees and slice in the opposite direction creating a dice.

Method 4: Most recommended

  1. Wash the tomato
  2. Remove the top. Near the top of a Roma tomato, there is a small stem. If you don’t mind the tomato stem, you can skip this step.
  3. Cut the tomato in half.
  4. Cut the tomato into vertical slices.
  5. Turn the two halves of your tomato sideways, so you’re cutting them length-wise.
  6. Make vertical cuts to cut the tomato into thin strips of roughly even sizes
  7. Dice the tomato slices
  8. Turn your strips sideways and make a series of cuts running across the strips length-wise.
  9. This should cut your Roma tomatoes into small cubes
  10. When you’re finished, you’ll be left with a pile of diced Roma tomatoes

Additional Tips on How to Dice Roma Tomatoes

  • The little stem end usually doesn’t amount to anything. But lopping it off won’t hurt anything either, so do whichever way you prefer. Some people don’t bother cutting off the stem, as it’s so small it’s largely unnoticeable.
  • How many slices you make depends on how small or large you want the dice to be.
  • Wash each Roma tomato under the faucet, turning it as necessary to wash the full surface and remove dirt and debris. If the Roma tomato has any stickers on it, make sure to remove these before dicing.
  • Cut the tomato length-wise to cut it in half. Cut it with one hand and hold it in place with the other. Try to keep the two halves of the tomato in roughly even sizes.
  • As Roma tomatoes are smaller than regular tomatoes, be careful when using your fingers to hold the tomato in place. Use only the tips of your fingers, and be extra careful to keep your fingers away from the knife.
  • Your goal is to keep your cuts the same length, so your diced tomatoes are roughly the same size.

Read: Different Types of Oregano

Related Products