Place gnocchi, broccoli, onion, lemon, and olives on a large baking sheet. Sprinkle garlic, red pepper flakes, salt, and few grinds pepper over top.
Drizzle gnocchi mixture with olive oil, then use clean hands (or a spatula) to mix it all together. Everything should be evenly coated with oil when you're done.
Bake for 20 minutes, then flip. Cook for 15 to 20 minutes more, or until veggies and gnocchi are tender and browned in spots.
Squeeze juice from roasted lemon over gnocchi (use tongs), then discard peel. Season generously with additional salt and pepper to taste.
Serve sprinkled with Parmesan cheese. Enjoy!
Notes
Look for packages of gnocchi that are around 1 pound (454 grams) or so. I used De Cecco Gnocchi, which comes in a 17.5 ounce (500 gram) package.For best results, ingredients should be in a single layer on the baking sheet. Use two pans, if needed.Make sure to read the info before this recipe card for helpful tips, variations, serving suggestions, and more!