Start by quartering your 7 pounds of Roma or San Marzano tomatoes directly into a large pot—I prefer to work over the pot to capture any juices. Place the pot on medium-low heat and stir frequently as the tomatoes break down and release their liquid, which should take about 30-40 minutes. Add a splash of water only if the tomatoes seem to be sticking or if they're releasing very little liquid. While the tomatoes cook, peel and mince your 6 garlic cloves, dice your onion into 1/2-inch pieces, and roughly chop your fresh basil leaves. This prep work ensures everything is ready when you need it.

Once the cooked tomatoes are completely soft, pour them through a fine-mesh strainer into a clean large pot, pressing gently to extract all the juice while leaving behind the skins and seeds—discard the solids. While draining, combine your prepared diced onion, minced garlic, and chopped basil in a food processor and blend until you achieve a fine, paste-like consistency. This puree will incorporate smoothly into the tomato juice and create a more refined texture.

Pour the strained tomato juice into your large pot and add the vegetable puree from Step 2, along with the sugar, salt, and black pepper. Stir well to combine all ingredients evenly. Bring the mixture to a simmer over medium heat and let it reduce by about 25% (this should take 20-30 minutes and will concentrate the flavors significantly). I like to let the soup simmer gently rather than boil aggressively—this preserves the fresh tomato flavor better than a rolling boil.

If you prefer a completely smooth soup, use an immersion blender or carefully transfer the soup in batches to a regular blender and puree until your desired consistency is reached (this step is optional—many prefer a slightly rustic texture). Working quickly while the soup is still hot, ladle it into clean, sterilized jars, leaving about 1/2 inch of headspace. Add the bottled lemon juice for preservation: 1 tablespoon per pint jar or 1/4 cup (2 tablespoons) per quart jar. The acid is essential for safe canning, so don't skip or reduce this step.

Wipe the rims of each jar thoroughly with a clean, damp cloth to remove any drips or debris, then place the lids and screw bands on firmly (but not overly tight). Fill your water bath canner with enough water to cover the jars by at least 2 inches and bring it to a rolling boil. Carefully lower your filled jars into the hot water and cover the canner. Once the water returns to a boil, process pint jars for 40 minutes or quart jars for 45 minutes, adjusting time if you're at high altitude.

Once processing time is complete, carefully remove the canner from heat and let it sit undisturbed for 5 minutes before removing the jars. Place the hot jars on a clean towel or cooling rack and let them cool to room temperature undisturbed for 12-24 hours—during this time you'll hear the satisfying 'pop' as the lids seal. Check that the centers of the lids are concave (slightly indented), which indicates a proper seal. Any jars that didn't seal should be refrigerated and used within a few weeks.

When you're ready to enjoy your canned soup, heat it gently in a pot over medium heat. For each pint of soup, stir in about 1/2 cup of cream, half-and-half, or milk to create a creamy tomato bisque, adjusting the amount to your preference. Season with additional salt and pepper if needed and serve hot. I find that starting with less cream and adding more to taste lets each person customize their bowl perfectly.