120gdill picklesfinely chopped (about 3–4 small spears; 1 cup)
40gsweet pickles or bread-and-butter picklesfinely chopped (1/4 cup)
40gyellow onionfinely chopped (1/4 cup)
30gred bell pepperfinely chopped (2 Tbsp)
30gceleryfinely chopped (2 Tbsp; optional)
60mlyellow mustard1/4 cup
15mlwhite vinegar5% acidity (1 Tbsp)
2tspgranulated sugar8–10 g, or to taste
1/4tspcelery seed1–2 g
1/4tspkosher salt1–2 g, plus more to taste
1pinchground turmericoptional, for color
For the hot dogs
4beef or beef-and-pork hot dog sausagesstandard size, about 45–56 g each
4hot dog bunssplit (top-split or side-split)
2tspneutral oil or softened butterfor toasting buns (10 g)
yellow mustardto serve
ketchupto serve (optional)
white or yellow onionfinely chopped, to serve
Instructions
Make the relish base. Finely chop the dill pickles, sweet pickles, onion, red bell pepper, and celery so the pieces are no larger than a pea.
Mix and season. In a medium bowl, whisk together the yellow mustard, white vinegar, sugar, celery seed, salt, and turmeric if using. Taste; it should be tangy with gentle sweetness.
Combine everything. Fold the chopped vegetables into the mustard mixture until evenly coated. If it looks dry, add another 1–2 teaspoons mustard or a splash of pickle brine.
Let the relish rest. Cover and let sit at room temperature for at least 10–15 minutes while you prepare the hot dogs.
Preheat your cooking surface. Heat a grill or grill pan over medium, or a skillet over medium to medium-low; preheat a couple of minutes and lightly oil if needed.
Score the hot dogs (optional). Cut 3–4 shallow diagonal slashes in each hot dog, about 3 mm / 1/8 inch deep, to reduce curling and help browning.
Cook the hot dogs. Cook, turning every 1–2 minutes, until browned and heated through: about 6–8 minutes on a grill or 5–7 minutes in a skillet.
Toast the buns. Lightly butter or oil the cut sides and toast cut-side down 30–60 seconds until warm and golden at the edges.
Stir and adjust the relish. Stir, then adjust with more sugar, vinegar, or salt. To thin, add 1–2 teaspoons water or pickle brine.
Assemble the hot dogs. Place each hot dog in a toasted bun, spoon relish along the length, and add mustard, ketchup (if using), and chopped onion.
Serve right away. Serve immediately, with extra relish on the side if desired.