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Beef Slider Casserole

A comforting casserole that combines savory ground beef, colorful peppers, and melted cheese under soft slider rolls, perfect for family dinners or gatherings.
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Prep Time 20 minutes
Cook Time 15 minutes
Total Time 35 minutes
Servings: 6 servings
Course: Dinner, Main Course
Cuisine: American
Calories: 450
Ingredients Method Notes

Ingredients
  

For the Beef Mixture
  • 1 Tbsp vegetable oil
  • 1 lb ground beef Use lean ground beef to reduce grease.
  • 1 tsp Kosher salt Adjust to taste.
  • 0.5 tsp freshly ground black pepper Adjust to taste.
  • 1 medium yellow onion, chopped
  • 1 each green bell pepper, chopped
  • 1 each red bell pepper, chopped
  • 2 cloves garlic, finely chopped
  • 2/3 cup ketchup
  • 1 Tbsp chili powder
  • 1 tsp dried mustard
  • 1 can tomato sauce (8 oz)
  • 1 cup low-sodium beef or chicken broth
  • 2 Tbsp apple cider vinegar
  • 2 Tbsp Worcestershire sauce
  • 2 tsp dark brown sugar
  • Hot sauce (optional) Add for heat as desired.
For the Casserole Assembly
  • 8 each sweet Hawaiian slider rolls, halved crosswise
  • 1 Tbsp unsalted butter, melted
  • 1 cup shredded cheddar
  • Chopped fresh parsley, for serving (optional)

Method
 

Preparation
  1. Preheat your oven to 375 degrees Fahrenheit.
  2. In a large skillet over medium-high heat, add the vegetable oil. Once hot, add the ground beef, seasoned with kosher salt and black pepper, and cook until crumbled and no longer pink, about 6-8 minutes. Transfer the beef to a plate and drain excess fat, keeping about 1 tablespoon in the skillet.
  3. In the same skillet, cook the chopped onions, green bell pepper, red bell pepper, and garlic over medium heat until softened, about 10-12 minutes, adding more salt and pepper as needed.
  4. Add the ketchup and reduce it down to a thick paste for about 5-6 minutes. Stir in chili powder and dried mustard, cooking for an additional 30 seconds.
  5. Add tomato sauce, broth, cider vinegar, Worcestershire sauce, and dark brown sugar to the skillet and mix well. Return the cooked beef to the skillet and incorporate thoroughly. Add hot sauce if desired.
Assembly
  1. Transfer the beef mixture to a 2-quart baking dish, spreading it evenly.
  2. Cut the slider rolls in half crosswise, placing the cut sides down on top of the beef mixture.
  3. Brush the tops of the slider rolls with melted butter and sprinkle with shredded cheddar cheese.
Baking
  1. Bake in the preheated oven for 10-15 minutes until the rolls are toasted and cheese is melted.
  2. Allow to cool slightly before serving. Optionally, garnish with chopped parsley.

Notes

Store leftovers in an airtight container in the refrigerator for up to 3-4 days or freeze for up to 3 months.