Garlic, lots of garlic :)
My pantry always runs out of garlic. Local people always buy garlic. Bless me, so far I haven't attacked by a garlic-breath when I talk to anybody here.
Drizzle some oil in a skillet, throw in a lot of fresh garlic slices, now turn on the heat but keep it very low, saute the garlic for 2 minutes. Raise up the heat a little bit, saute the Brussels sprouts for 3 minutes, discard any garlic which got burnt. Add little vegetable stock and cook the Brussels sprout at medium heat for 2 minutes. Toss in cooked ricotta tortellini and cook for another minute. Sprinkle some chopped parsley leaves and grate hard cheese to finish.