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Crockpot Cheeseburgers
- 1 teaspoon olive oil
- 1 ½ pounds lean ground beef
- 1 onion, diced
- 2 cloves garlic, minced
- Salt and pepper
- 8 ounces Velveeta cheese, cubed
- 2 tablespoons ketchup
- 2 tablespoons mustard
- Buns, for serving
- Cheese slices, for serving
- Pickles, for serving
