For beef sliders: In a bowl, combine ground beef with salt and pepper. Form into 4 small patties (about 2 oz each).
For chicken sliders: In a bowl, mix ground chicken, 2 tbsp BBQ sauce, salt, and pepper. Form into 4 small patties.
For black bean sliders: Mash black beans in a bowl, then mix with breadcrumbs, onion, jalapeño, cumin, smoked paprika, salt, and pepper. Form into 4 patties.
Grill beef and chicken patties for 3-4 minutes per side, brushing chicken with additional BBQ sauce during last minute. Grill black bean patties for 4-5 minutes per side.
Toast slider buns on grill for 1 minute.
Assemble sliders: place patties on buns and add desired toppings.
Tips
Keep patties moist by not overworking the meat.
For extra flavor, add cheese slices during last minute of grilling.