Add the olive oil to a small saucepan or frying pan with high sides. Do not use a heavy-bottomed pan or skillet as we do not want the pan to retain heat.
Use a garlic press to press the garlic into the oil. If you don't have a garlic press you can finely mince the garlic instead. Turn the heat on at a medium-high temperature. Note, it's important to start with cold oil in a cold pan (or at room temperature).
Use the whisk to distribute the garlic in the oil and wait for small bubbles to start rising in the oil. The oil will heat up quickly after this.
When the oil starts bubbling lively, gently whisk the garlic every few seconds and cook for no more than two minutes maximum.
As soon as any of the garlic is a very light golden brown (between 90 seconds to 2 minutes) remove the pan from the heat and add in the black pepper and whisk once more. Set a timer for five minutes.
Wash, dry and chop the lettuce. I like to use my hand to slighlty flatten it and do one-inch slices and then turn the chopping board and chop up the slices. Place in a large salad bowl.
When the time goes off, decant the garlic oil to a clean screw-top jar or bowl and place in the freezer while you prepare the parmesan.
Microplane or finely grate the garlic until you have a packed ¼ cup.
Take out the garlic oil and check it is cool or at room temperature. Add the parmesan, salt and vinegar. I like to add the vinegar to the pan I cooked the garlic in and swirl it around before adding it to the dressing, to make sure I get most of the oil and garlic out.
Screw the top on the jar and shake vigurously, or whisk, until a creamy pale golden consistency.
Add the dressing to the chopped greens. If you have a lot of dressing clinging to the jar or bowl, I like to add a tablespoon of water to loosen it and then add that to the salad. Toss well until all the leaves are coated, taste and adjust (more salt/vinegar/parmesan) and serve immediately.