Roast Salsa: Char tomatoes, bell pepper, garlic, and chili over a flame or broiler. Blend with cilantro, lemon juice, salt, and pepper until chunky.
Sauté Fajitas: High-heat sauté peppers and onions in oil with paprika, cumin, and salt until charred but crisp. Finish with lime juice.
Cook Filling: Sauté onions, garlic, and jalapeño. Stir in tomato paste, spices, corn, and beans. Mash a portion of the beans to bind. Mix in lime juice.
Prepare Queso: Melt butter with turmeric. Add milk and bring to a simmer. Whisk in cheese slices until smooth, then stir in pickled jalapeños and brine.
Prep Buns: Slice the entire slab of slider rolls in half horizontally. Mix spiced butter ingredients in a small bowl.
Assemble: Spread roasted salsa on the bottom buns. Layer the corn-bean filling, then fajita veg, and pour the queso over the top.
Top & Glaze: Place the top buns on. Brush the tops and sides generously with the spiced butter mixture.
Bake: Bake at 350°F (175°C) for 10–12 minutes until the cheese is melted and the tops are golden-brown.