Step 1

Heat the olive oil in a large pan over medium heat. Add the onion and cook for 3-4 minutes or until translucent.

Step 2

Add the ground beef to the pan and cook for 5-6 minutes, breaking up the meat into small pieces with a spatula.

Step 3

Add the taco seasoning and tomato sauce, then bring to a simmer.

Step 4

Preheat the oven to 375 degrees. Slice the rolls in half and place the bottom half of the rolls on a sheet pan.

Step 5

Bake for 5 minutes or until bread is lightly toasted.

Step 6

Spoon the meat over the bottom of the rolls, then layer the cheese on top.

Step 7

Place the top buns over the cheese layer.

Step 8

Mix the butter and garlic powder and brush the mixture over the tops of the rolls.

Step 9

Bake for 10 minutes or until the rolls are browned and the cheese is melted.

Step 10

Sprinkle with cilantro and serve with guacamole and salsa if desired.