Juicy burger with spicy "Bulgarian Sense" ketchup

A classic homemade burger with character. Spicy ketchup replaces the ordinary kind and instantly elevates the flavor by several levels.

Instructions:

1. Season the ground meat with salt and pepper and form into 4 patties.
2. Grill them in a hot pan or on a grill for 3 to 4 minutes per side.
3. During the last minute, place a slice of cheese on each patty to melt.
4. Lightly toast the inside of the buns.
5. Spread the spicy ketchup on the bottom half of the bun.
6. Layer with lettuce, patty, tomato, and onion.
7. Add a little more ketchup on top and close the burger.