2 teaspoons crushed garlic, or more if you wish
1 egg yolk
1 tablespoon lemon juice
1/4 teaspoon salt
pinch of pepper
1 cup olive oil (or vary the oil for different flavors)
You should have all of the ingredients at room temperature before you start. Make this in a bowl that is heavy enough that it won't move across the counter as you're mixing, or make it in your food processor.
Mix the garlic, egg yolk, lemon juice, salt and pepper in a heavy mixing bowl with a hand mixer until the yolk lightens and thickens slightly (about 1 minute).
Start adding the olive oil, drop by drop, mixing all the while with your hand mixer. You can add it a bit faster as you go along, but as with mayonnaise,
the key to success is going very slowly. When you are done adding the oil you can adjust the seasoning as suits your taste.
This makes 1 cup - maybe you should double the recipe, it is so good.