In a medium-sized saucepan, melt the butter over medium-high heat and sauté the minced garlic until fragrant (about 1 minute).
Add the couscous to the saucepan and stir continuously for about 1 minute to lightly toast.
Pour in the chicken broth and bring to a boil, ensuring all couscous grains are submerged.
Reduce heat to low, cover, and simmer until liquid is absorbed (approximately 10-12 minutes).
Remove from heat, stir in Parmesan cheese, season with salt and pepper, and add red pepper flakes if desired.
