Dice the cucumber, red onion, and red bell pepper into small, even pieces. Finely chop the fresh dill.
In a medium mixing bowl, toss together the diced cucumber, red onion, red bell pepper, and dill until evenly mixed.
In a small saucepan, add the vinegar, water, salt, and honey. Heat over medium-high heat for 2–3 minutes, stirring until the honey and salt fully dissolve. Do not boil.
Pour the warm brine over the vegetable mixture. Stir well and let it sit for no more than 5 minutes to quick-pickle the vegetables.
Use a colander or fine mesh strainer to drain the brine from the vegetables. Let it sit briefly to remove excess liquid.
Transfer the pickled vegetables to an airtight container. Refrigerate for at least 30 minutes before serving. Store in the fridge for up to 5 days.
Use as a topping for burgers, tacos, wraps, grilled proteins, or enjoy as a dip with chips.