Preheat the grill or a grill pan to medium-high. You want solid heat to re-crisp leftovers quickly without drying them out. If you don’t have a grill, a hot cast-iron skillet works.
Build the quick sauce. In a small bowl, stir together 1/3 cup BBQ sauce, 1 tablespoon apple cider vinegar, 1 teaspoon mustard, and a squeeze of honey.
Add hot sauce to taste. You’re aiming for tangy-sweet with a little heat.
Prep the leftovers. Slice proteins against the grain into bite-size pieces so they warm evenly. Cut grilled veggies into chunks or strips.
If using corn on the cob, slice off the kernels.
Season lightly. Toss proteins and veggies with a drizzle of olive oil, a pinch of salt and pepper, and a sprinkle of smoked paprika or chili powder. This refreshes flavor without overpowering it.
Grill the veggies first. Spread leftovers on the grill grates or in a grill basket. Cook 3–5 minutes, flipping once, until hot with renewed char.
Remove and set aside.
Grill the proteins. Place the meats or tofu on the grill. Warm 2–4 minutes, flipping as needed. Brush lightly with the quick sauce during the last minute to glaze without burning.
Warm the base. If using tortillas or flatbreads, heat them on the grill 20–30 seconds per side.
For rice or potatoes, toss with a little oil and crisp in a skillet on the side.
Assemble. Layer your base in bowls or on a platter. Pile on the grilled veggies and proteins. Drizzle more sauce.
Add fresh toppings: herbs, sliced green onions, slaw, pickles, and a squeeze of citrus.
Add cheese if you like. Sprinkle shredded cheddar, crumbled feta, or cotija over the hot mixture so it softens slightly.
Taste and adjust. Finish with a pinch of salt, a crack of pepper, extra hot sauce, or a touch more vinegar to brighten.