Ingredients
1 tbsp. extra-virgin olive oil
1 medium onion, chopped
1 lb. ground beef
2 cloves garlic, minced
1/2 c. ketchup
1/3 c. packed brown sugar
2 tbsp. yellow mustard
1 tbsp. chili powder
Kosher salt
Freshly ground black pepper
4 tbsp. Butter, for bread
8 slices sandwich bread
2 c. shredded cheddar
Preparation
Step 1In a large skillet over medium heat, heat oil. Add onion and cook, stirring, until soft, about 5 minutes. Add ground beef and cook, stirring and breaking up meat, until no longer pink, 6 to 8 minutes. Drain fat.Step 2Return beef mixture to skillet over medium heat and stir in ketchup, garlic, brown sugar, mustard, and chili powder and season with salt and pepper. Simmer until thick, 5 minutes. Transfer mixture to a plate and wipe skillet clean.Step 3Assemble sandwiches: Butter one side of each bread slice. Place 1 slice butter-side down in skillet and spoon over sloppy joe mixture. Top with cup of cheddar cheese and one more slice bread, buttered-side up.Step 4Cook over medium heat until bread is golden and cheese is melty, about 3 minutes per side. Repeat with remaining ingredients to make 4 sandwiches total.