Place a 10-12 inch skillet over medium-high heat. Add oil. When the oil is hot, swirl it around the skillet, then add the broccolini. Toss with tongs to coat in the oil.
Cook for 3-4 minutes or until broccolini is vibrant in color with a little charring.
Add the garlic, salt, and pepper; toss. Cook for 30 seconds.
Add the water and cover immediately with the lid. Reduce the heat to a low. Cook until broccolini stalks are tender, 3 to 4 minutes.
Remove the skillet from the heat and squeeze lemon juice over the broccolini.
Garnish with flakey salt and crushed red pepper flakes, if desired.
