This natural technique allows you to preserve your tomatoes for 2 years without vinegar.

What criteria should you use to select your tomatoes?

Not all tomatoes are suitable for canning. Here's how to make the right choice:

• Choose varieties with dense flesh  such as Roma or San Marzano, which contain less water and more matter.
• Choose perfectly ripe fruit  with flawless skin and even coloring. A good test? The stem should come off effortlessly.
• Take advantage of the summer season  to get tomatoes full of sunshine and sold at reasonable prices.

Helpful Tip:  If your tomatoes look a little green, let them ripen for a few extra days at room temperature to develop their full flavor potential.