A spicy hot link sausage on a bun with grilled onions is a high protein, carnivore-approved BBQ sandwich. This bold, family-cookout favorite brings serious heat and smoky flavor.
Slice the large onion into thin rings and set aside.
Heat 1 tbsp butter in a skillet over medium-high heat; add onions, season with salt and pepper, and grill until golden and soft, about 8 minutes. Stir occasionally for even browning.
While onions cook, preheat a grill or grill pan to medium-high heat.
Place hot link sausages on the grill. Cook, turning every 2–3 minutes, until sausages are deeply browned and heated through, about 8 minutes total.
Brush sausages with BBQ sauce during the last minute of grilling, letting it caramelize slightly.
Toast hot dog buns by placing them cut-side down on the grill for 1–2 minutes; brush lightly with remaining butter before toasting for extra flavor.
To assemble, add grilled onions to the toasted buns, top each with a saucy hot link, and serve immediately.