Pepper production is reaching its peak at Prairie Fruits Farm and Creamery in Champaign. Our walk-in cooler is filling up with a brilliant display of red, yellow, green and orange capsicums. Even though we are currently experiencing a September heatwave that feels more like July, we know cold weather is around the corner, and one day our phones will buzz with an AccuWeather notification: “Frost Advisory: Areas of frost are expected, posing a threat to sensitive vegetation.” While historical records place the average hard freeze in Springfield around Oct. 22, I remember the killing freeze that arrived freakishly early on Sept. 20, 1991. We were out of town and had to call on our friends to gather sheets and quilts to cover our flower beds and pepper plants – then at their peak autumn beauty – from the incoming freeze.
When a freeze threatens, you must act quickly. Sub-freezing temperatures destroy plant tissue, turning leaves and stems into limp waste. Harvest all your peppers and move them indoors. Then you face the challenge of what to do with your harvest before it rots.
Managing your late-season bounty doesn’t mean spending hours tending to a pressure canner or hot-water bath. A simple, practical approach is to split your harvest between two preservation techniques: quick vinegar pickles for a crisp, immediate treat and a salt-brine lacto-fermentation to craft a nuanced, shelf-stable preserve that improves with age.
Quick-pickling (or “refrigerator pickling”) is the fastest route from garden bed to table. When I put up sweet pepper varieties for salads, sandwiches or cheese and charcuterie spreads, I generally lean on this technique. For my pickling brine, I combine water, vinegar and sugar in a 3:2:1 ratio, adding 1 tablespoon of salt per cup of vinegar. I bring this brine to a rolling boil before pouring it directly over the pepper-filled jars. The vinegar is essential: its acidity halts bacterial growth, preserves the pickles, and adds a bright, tangy bite.
Unlike quick pickling, which relies on added acid, fermented pickling depends on the naturally occurring lactobacillus bacteria found on pepper skins. These bacteria consume plant sugars and produce lactic acid, which mellows the heat while building a deeper umami flavor. Because of this rich complexity, lacto-fermentation is my favorite way to preserve hot peppers, which I typically turn into hot sauces.
If extra peppers remain after you run out of jars, rinse and dry them, trim the stems, and place them whole in a freezer bag. Freezing softens their crisp bite, making them unsuitable for fresh salads, but they still work well for adding flavor to winter braises, stews and soups.
Quick refrigerator pickled peppers
Champagne or apple cider vinegar are my top choices here, but standard distilled white vinegar works perfectly fine as a budget-friendly option.
Ingredients:
1 pound of peppers, stemmed and left whole or sliced into rings
3 cups of water
2 cups of vinegar
1 cup of sugar
2 tablespoons kosher salt
4 cloves garlic, smashed
1 teaspoon whole black peppercorns
Optional spices such as mustard seeds, whole coriander, pepper flakes, or fennel seeds
Preparation:
In a stainless steel saucepan, combine the water, vinegar, sugar and salt. Bring to a boil, stirring until the salt and sugar completely dissolve.
Toast the peppercorns alongside any additional spices in a pan until fragrant, taking care not to scorch them.
Pack your peppers tightly into clean glass pint jars along with the smashed garlic cloves and toasted spices.
Carefully ladle the hot brine over the peppers, leaving 1/2 inch of headspace. Gently tap the jars on the counter to release trapped air bubbles.
Attach non-reactive lids, such as plastic or enamel-lined caps. Allow the jars to rest on the counter until cooled to room temperature before storing them in the fridge. Wait at least 48 hours for the flavors to meld before opening; stored refrigerated, they will stay fresh for up to three months.
Fermented hot sauce
This is a Tabasco or Sriracha-style hot sauce. Adding carrots adds natural sugar and color.
Ingredients:
1 pound hot peppers, chopped
1 small carrot, peeled and chopped
3 cloves garlic, peeled and smashed
1 quart unchlorinated water
3 tablespoons kosher salt (for a ~3.5% strength brine)
2 tablespoons apple cider vinegar (added post-fermentation)
Preparation:
Whisk the salt into the water until fully dissolved. (Avoid tap water treated with chlorine as it halts bacterial growth.)
Pack the chopped peppers, carrot, and garlic into clean, wide-mouth quart glass jars. Pour the brine over the vegetables until they are completely submerged.
Vegetables exposed to oxygen will grow surface mold. Use a glass fermentation weight or a water-filled zip-top bag to press the solids below the liquid line. Cover loosely with a lid or fermentation airlock.
Keep the jars in a room-temperature space out of direct light. Place them on a tray to protect your counter. Active fermentation will show within 48 hours as the brine grows cloudy and tiny bubbles begin ascending. Be sure to burp the jar every day if you are using a standard lid to vent accumulating carbon dioxide gas.
After seven to 14 days, taste the brine. Once it tastes sour and complex, strain the vegetables and reserve the liquid. Transfer the solids to a high-powered blender with 1/2 cup of the reserved brine and two tablespoons of apple cider vinegar. Purée until completely smooth, adding more liquid if needed. Bottled in glass, this raw fermented sauce will keep in the refrigerator for at least a year.
After retiring from a 40-year career in dentistry at age 66, Dr. Peter Glatz embraced his lifelong dream of becoming a professional chef. For the next seven years he gained hands-on experience in highly regarded kitchens nationwide. His transition from the exacting world of dentistry to the inventive world of culinary arts is a testament to the possibility of reinvention by teaching cooking classes at Prairie Fruits Farms and Creamery in Champaign.
This article appears in September 17-23, 2026.
