In a small bowl, add olive oil, anchovy paste, garlic and salt; stir with brush to combine. Brush each side of romaine heart lightly (just for grilling, so try not to get much anchovies on the brush) and place on a platter.
Preheat grill to medium-high heat (500 degrees F) and brush with oil. Place romaine hearts on a grill and grill for 2-3 minutes or until charred a bit, pressing onto it with tongs. Flip, grill for another 2-3 minutes and transfer onto the same platter.
Brush each side, especially the cut side with lots of layers to soak up the sauce, with magic sauce and serve warm or cold. Grilled romaine lettuce basically replaces salad and helps you eat more vegetables.
Notes
Use full heads of romaine or the hearts. Really depends on a size.
Skip anchovy paste if not a fan or use minced anchovies.