Wash and chop the broccoli into florets, trimming off any tough stems along the way.
Steam the broccoli for about 5 minutes—just until it’s tender but still bright green.
In a large skillet over medium heat, warm up the olive oil and butter.
Toss in the minced garlic and sauté for a minute or so, just until it smells amazing.
Add the steamed broccoli and toss it around so it gets coated in all that garlicky oil.
Sprinkle in salt, black pepper, and lemon zest. Give it another good toss to spread the flavors around.
Turn off the heat and shower the broccoli with grated Parmesan, letting it melt and cling to all the nooks and crannies.
Gently toss everything one more time so every bite gets cheesy and flavorful.