Here’s the way to do it.

Slice the green tomatoes as you would for fried green tomatoes.

Put the slices in a wide mouth canning jar.

Try am pick ones that fit the jar, the diameter.

Put into each jar a teaspoon of salt and a TBLS. lemon juice.

Fill the jars with hot water to 1/2 ‘” from the top, run a butter knife around the outside of the tomatoes to release any air trapped.

Put jar rings on and put them into a boiling water bath for about 40 minutes.