Warm the extra-virgin olive oil in a large skillet over medium heat. Add the broccoli florets, thinly sliced garlic, sea salt, and a few grinds of black pepper. Sauté the mixture for 3 to 4 minutes until the broccoli is bright green and the garlic is fragrant.
Pour in 2 tablespoons of water, then cover the skillet. Let the broccoli steam until it becomes tender, which should take about 2 to 4 minutes.
Remove the skillet from the heat. Squeeze fresh lemon juice over the broccoli and add a pinch of red pepper flakes for a spicy kick, if desired. Adjust the seasoning with more salt and black pepper according to your taste. Serve immediately.