Pour the milk into a small saucepan on medium heat. Add a pinch of salt and the rosemary sprigs and let infuse for about 15 minutes, at just below a simmer. Be careful not to infuse for too long or the milk may end up tasting medicinal.

In a second small saucepan, melt the butter over medium heat and add the flour. Let cook for 3 minutes, whisking continually. Whisk in the rosemary-infused milk. Keep cooking/whisking until the sauce thickens to about the consistency of single cream. This will take about 2 to 3 minutes. Whisk in the parmesan cheese, nutmeg, and several grinds of black pepper. Let cook a final minute or two until the sauce is the consistency of syrup. Add extra salt as needed. Keep the sauce warm.

Add a splash of veg oil to a medium pan on high heat. Season your steak with salt and pepper, then lay it into the pan. Toss in the garlic cloves. Sear the steak to your liking (I find about 4 minutes per side to be about right). Use a spoon to baste the meat with the garlicky oil while frying. If the garlic cloves start to burn, pull them out and throw them away. Once cooked, remove the steaks to a plate to rest.

Pour off the oil from the pan and add a fresh splash of veg oil. Add the cauliflower chunks and give them a toss in the oil. Cover and let cook for 5 minutes, stirring occasionally. Season the cauliflower with salt and pepper, and pour them onto a serving platter. Slice the steak and lay those pieces on top. Drizzle everything with the parmesan sauce.