Preheat your oven to 400°F.
Toss the cubed red potatoes with half of the olive oil, minced garlic, salt, and dried herbs of your choice on a baking sheet.
Roast the potatoes for 25-30 minutes, tossing halfway through, until they are golden and crispy.
Season the sirloin steak generously with salt and black pepper on both sides.
Heat the remaining olive oil in a cast-iron skillet over medium-high heat.
Sear the steak for 4-5 minutes per side for medium-rare, or until it reaches your desired level of doneness.
Remove the steak from the skillet and let it rest on a cutting board for 5 minutes before slicing against the grain.
While the steak rests, steam the broccoli florets in a steamer basket for 5-6 minutes until tender-crisp and bright green.
Toast the sourdough bread until lightly browned.
Plate the sliced steak alongside the roasted potatoes and steamed broccoli, serving the sourdough on the side with a dollop of cottage cheese for dipping or spreading.