Ingredients (makes about 2 cups):
2 medium red onions, thinly sliced (a sharp knife or mandoline works best)
1 cup apple cider vinegar or white vinegar
1 cup warm water
1–2 tablespoons sweetener of choice (or skip it entirely to taste)
1 teaspoon sea salt
Optional add-ins: ½ teaspoon whole peppercorns, a pinch of red pepper flakes, or one garlic clove
Instructions:
Slice the red onions as thinly as possible and pack them tightly into a clean glass jar.
In a measuring cup, whisk together the vinegar, warm water, sweetener, and salt until everything dissolves completely.
Pour the liquid over the onions, ensuring they are fully submerged. Add any optional spices now.
Seal the jar, give it a gentle shake, and let it sit at room temperature for 30–60 minutes.
Transfer to the refrigerator. For the best flavor, wait at least 2 hours – overnight is even better. The onions will keep well for up to 2–3 weeks.
Start small – just a few forkfuls per meal – and notice how your body responds as part of your normal eating pattern. Many people find they enjoy these as a topping rather than a main dish, which naturally keeps portions moderate and easy to sustain.
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